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Recent Homework Questions About Statistics
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statistics
a mathematically defined curve that is the comparison distribution used n ANOVA is called the?
statistics
A researcher conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a particular job-skills training program. The cutoff "t" needed is -1.8333. The standard deviation of the distribution of me...
statistics
can anyone help me with this problem? a sample of n=9 indivividuals was selected from a normally distributed pop. with a mean of M=25 and a standard deviation of 6.a treatment was administered to the sample, and treatment , the nine individuals produced the following score: 36...
statistics
A researcher interested in relationships developed a questionnaire that measures the degree of affection adult men feel for their fathers. She has found that for the general population the distribution is skewed to the right, the mean degree of affection is 60, and the standar...
statistics
The cutoff "t" needed is -1.8333. The standard deviation of the distribution of means of change scores is 2.0 and the mean change score for the sample studied is an increase of 5.2. What is the t score?
MATH 116
Examine the rise in gasoline prices from 1997 to 2006. The price of regular unleaded gasoline in January 1997 was $1.26 and in January 2006 the price of regular unleaded gasoline was $2.31 (Bureau of Labor Statistics, 2006). Use the coordinates (1997, 1.26) and (2006, 2.31) to...
Statistics
h t t p : / / t i n y u r l . c o m / y k 3 d 6 t c I'm not sure how to do #3.
statistics
For a population with a mean of 30 and standard deviation of 6, describe the sampling distribution of the means for samples of N=9.
Statistics
Coin box Question: Assume that there are 25 pennies, 10 nickels, 10 dimes, and 5 quarters in a box. after shuffeling the box, you pick a coin at random and note down its face value. let x represent the face value of the coin in cents. then construct the probability distributio...
Statistics
Thankyou for the tutorials, SraJMcGin.
Elementary Statistics need help ASAP
Measures of Central Tendency Be sure to show your work so that partial credit may be awarded. 4. An MM207 statistics class surveyed 24 students to find out how many hours they spent doing homework during the previous week. 10 11 10 8 10 10 15 12 10 8 13 11 11 13 10 11 13 10 11...
Elementary Statistics need help ASAP
2. A research team studied the ages of patients who had heart attacks caused by smoking. The ages of 34 patients who suffered a heart attack were as follows. 29 30 36 41 45 50 57 61 28 50 66 58 60 38 36 47 40 32 58 46 61 40 55 32 61 56 45 46 62 66 38 40 40 27 Construct a Stem-...
statistics
Is it possible to have a mean of zero? A median of zero? I think yes, but you would have to have a set of just zeros, or you would need positive and negatives in your set. Am I right?
Statistics
Among employed women, 25% have never been married. Select 10 employed women at random. What is the mean number of women in such a sample who have never been married? What is the standard deviation? I think the mean would be 2.5, but I'm not sure about the standard deviation.
Statistics
According to a 2000 study by the Bureau of Justice Statistics, approximately 2% of the nation's 72 million children had a parent behind bars - nearly 1.5 million minors. Let X be the number of children who had an incarcerated parent. Suppose that 100 children are randomly ...
Statistics
The following data set represents the repair costs (in dollars) for a random sample of 30 dishwashers. 41.82 52.81 57.80 68.16 73.48 78.88 88.13 88.79 90.07 90.35 91.68 91.72 93.01 95.21 95.34 96.50 100.05 101.32 103.59 104.19 105.62 111.32 117.14 118.42 118.77 119.01 120.70 1...
statistics
Some college students collected data on the intensity of light at various depths in a lake. Here are their data: Depth (meters) Light intenisty (lumens) 5 168.00 6 120.42 7 86.31 8 61.87 9 44.34 10 31.78 11 22.78 Take the natural logarithm (ln) of the light intensity measureme...
Statistics
How do you code your data?
Statistics
How do you code your data?
Statistics
A recent study was designed to compare smoking habits of young women with those of young men. A random sample of 150 women revealed that 45 smoked. A random sample of 100 men indicated that 25 smoked. At the 0.05 significance level does the evidence show that a higher proporti...
Statistics
A large bank believes that one-third of its checking customers have used at least one of the bank's other services during the past year. How large a sample is required to estimate the actual proportion within a range of plus and minus 0.04? Use the 98 percent level of conf...
Statistics
The Internal Revenue Service is studying contributions to charity. The mean calculated from a random sample of 36 returns is $150. Assume that the population standard deviation is known and equal to $20. Construct a 98 percent confidence interval for the population mean.
Statistics
how do you find equation of the least-squared line (line of best fit) from 2-vars stats and the correlation?
STATISTICS
A study has shown that among people without any preschool education, 32% were employed at age 19. If 100 people without preschool education are selected, find the probability that 40 or fewer are employed.
statistics
you are dealt two cards successively(without Placement)from a shuffled deck of 52 playing cards .find the probability that both cards are black .express your answer as a simplified fraction.
statistics
a manufacturing process has a 70% yeild,meaning 70% of the products are acceptable and 30%are defective.if 3 of the products are randomly selected find the probability that all of them are acceptable.
Word Problem.
Describe the misuse or misinterpretation of statistics that may be involved: Over 60% of the people who fly to Normal, Illinois, do so on American Airlines. Hence, most people prefer American to any other airline. I would think the statistic of 60% and it being on American Air...
Statistics
Using formula P(x) = x/15 For each of the values x = 1, 2, 3, 4, and 5. a. probability distribution of x. b. Show that the probability distribution of x satisfies the properties of a discrete probability distribution. c. mean of x. sketch the two specified normal curves on the...
Statistics
Suppose that the probability distribution of a random variable x can be described by the formula P(x) = x/15 For each of the values x = 1, 2, 3, 4, and 5. For examples, then, p(x=2) = p(2) = 2/15 a Write out the probability distribution of x. b Show that the probability distri...
Statistics
Suppose that the probability distribution of a random variable x can be described by the formula P(x) = x/15 For each of the values x = 1, 2, 3, 4, and 5. For examples, then, p(x=2) = p(2) = 2/15 a Write out the probability distribution of x. b Show that the probability distri...
Statistics
A professor has noticed that, even though attendance is not a component of the final grade for the class, students that attend regularly generally get better grades. In fact, 39% of those who come to class on a regular basis receive A's. Only 14% who do not attend regularl...
Last equations question
The line y=0.15x+0.79 represents an estimate of the average cost of gasoline for each year. The line 0.11x-y=-0.85 estimates the price of gasoline in January of each year (Bureau of Labor Statistics, 2006). a)Do you expect the lines to be intersecting, parallel, or perpendicul...
statistics
What do these following symbols mean:X ¡Ü x - ¦Ì) / ¦Ò) X ¡Ý X ¡Ü
statastics
21. Payne (2001) gave participants a computerized task in which they first see a face and then a picture of either a gun or a tool. The task was to press one button if it was a tool and a different one if it was a gun. Unknown to the participants while they were doing the stud...
Statistics
This is the remaining part of Jackie's question:randomly selected adults. Show the formula that you will use and then calculate the mean age. Answer: Formula: mean = Mean:
statistics
What does the word "typical" have to do in relation to statistics? Is it the same as mode?
Statistics
The table below gives the ages and systolic blood pressure (measured in millimeters of mercury) of 9 randomly selected adults. Subject # 1 2 3 4 5 6 7 8 9 Age, x 41 44 48 51 54 56 60 64 68 Pressure, y 111 115 118 126 137 140 143 145 147 Part 1: Calculate the mean age of the 9 ...
Statistics
In hypothesis testing, if a claim statement is asking to test a percentage, your graph is a T or Z line?
Statistics
In hypothesis testing, if the population standard deviation is KNOWN, your graph should be labeled a T or Z line? In hypothesis testing, if the population standard deviation is NOT KNOWN, your graph should be labeled a T or Z line?
statistics
A test of writing ability is given to a random sample of students before and after they completed a formal writing course. The results are given below. Construct a 99% confidence interval for the mean difference between the before and after scores. You may assume the populatio...
statistics
A test of writing ability is given to a random sample of students before and after they completed a formal writing course. The results are given below. Construct a 99% confidence interval for the mean difference between the before and after scores. You may assume the populatio...
Statistics
A researcher interested in relationships developed a questionnaire that measures the degree of affection adult men feel for their fathers. She has found that for the general population the distribution is skewed to the right, the mean degree of affection is 60, and the standar...
statistics
please help me I've waited for hours The average price of a gallon of unleaded regular gasoline was reported to be $2.34 in northern Kentucky (The Cincinnati Enquirer, January 21, 2006). Use this price as the population mean, and assume the population standard deviation is...
math statistics
please help me I've waited for hours The average price of a gallon of unleaded regular gasoline was reported to be $2.34 in northern Kentucky (The Cincinnati Enquirer, January 21, 2006). Use this price as the population mean, and assume the population standard deviation is...
statistics
The Democrat and Chronicle reported that 25% of the flights arriving at the San Diego airport during the first five months of 2001 were late (Democrat and Chronicle, July 23, 2001). Assume the population proportion is p = .25. 1. Calculate () with a sample size of 1,200 flight...
math statistics
The average price of a gallon of unleaded regular gasoline was reported to be $2.34 in northern Kentucky (The Cincinnati Enquirer, January 21, 2006). Use this price as the population mean, and assume the population standard deviation is $.20. 1. What is the probability that th...
english
How does the author of the article, “A Nation Apart,” organize information to build his argument? Does he include any counterarguments? Why or why not? What kinds of statistics, graphs, or illustrations does the author include? In what ways do these visuals strengthe...
statistics math
The unemployment rate is 5.8% (Bureau of Labor Statistics, April 3, 2003). Suppose that 100 employable people are selected randomly. 1)What is the probability that exactly six people are unemployed (to 4 decimals)? 2)What is the probability that exactly six people are unemploy...
Statistics
When is the Analysis of Variance or ANOVA test used?
Statistics
I'm confused about the difference between the population and experimental units in a situation like the following: A questionnaire is being used to measure the reaction of two groups of students from a particular American university to a television clip: one group who know...
Statistics
How is the statistical application of Pearson r used for hypothesis testing. Through application of the Spearman Correlation what type of data is the Pearson formula used for.
Statistics
Which analysis of variance should be applied when an experiment has more than one independent variable. What are the assumptions and limitations of the analysis of variance in comparison with the t test including post hoc tests.
Statistics
A sociologist interested in cultural differences compared women of two ethinic groups on a Role Approval Index (high scores mean high degrees of approval of one's social role). The results are as follows: Ethnic Group A: N = 15 M= 55 S2 = 6.5 Ethnic Group B : N = 23 M= 51 ...
statistics
An animal trainer obtained the following sample data (Table A) in a study of reaction times of dogs (in seconds) to a specific stimulus. He then selected another group of dogs that were much older than the first group and measure their reaction times to the same stimulus. The ...
Math- Graphing Calculator Use
I'm trying to figure out how to find the Q1, Q3, mean, standard deviation, median, and correlation coefficient. My manual is not clear. It says go to VARS and Statistics and then I can choose from there but I don't know how to get the answers it keeps saying error. I t...
Statistics
What is the probability of drawing an ace and a 10, Jack, Queen, or King from a deck of cards?
Statistics - Monte's Dilemma
Why does it make a difference when you switch doors? What is the probability of winning given that you stayed and what is the probability given that you switched?
Statistics
What is the probability of drawing an ace and a 10, Jack, Queen, or King from a deck of cards?
statistics
A consumer magazine has contacted a simple random sample of 33 owners of a certain model of automobile and asked each owner how many defects had to be corrected with in the first 2 months of ownership. The average number of defects was x with (with line over the x)=3.7, with a...
Statistics
What is the Central Limit Theorem and how can it be used in statistics?
English
Posted by Mary on Wednesday, October 14, 2009 at 10:20am. In 2003, Governor Robert L. Ehrlich wisely lifted the moratorium. His decision was justified. In 2005, a careful review of the study by Professor of Statistics and Sociology Richard Berk of the University of California,...
Statistics
I have to sample 300 persons. How do I go about doing this and how do I know that the population I have chosen has the characteristics that I am looking for?
English
In 2003, Governor Robert L. Ehrlich wisely lifted the moratorium. His decision was justified. In 2005, a careful review of the study by Professor of Statistics and Sociology Richard Berk of the University of California, Los Angeles, and his coauthors found that the results of ...
statistics
Which analysis of variance should be applied when an experiment has more than one independent variable. What are the assumptions and limitations of the analysis of variance in comparison with the t test including a discussion of post hoc tests.
statistics
Assume the population distribution of FEV is normal with standard deviation 400 mLi. (a) find P(E) is n=15 and population mean is 2800 mLi (B) find P(E) is n=15 and the population mean is 2600mLi (C) How does P(E) depend on the population mean?
english
Which of the following usually gets a source note on the same page it appears? a. Quote b. Photo c. Paraphrased Passage d. Statistics please help me it urgent!! thank you!
statistics
2
Statistics
The ____________ is a hypothesis-testing procedure in which there are two separate groups at people tested and the population variance is not known. - t test for dependent means - t test for a single sample - t test for independent means - t test for repeated measures
Statistics
Suppose a researcher wants to study the effectiveness of a new reading program for students who have not acquired the necessary reading skills by the time they reach the 8th grade. A randomly selected group of 50 students from a local junior high with poor reading skills will ...
Statistics
Consider a study in which the population variance estimate based on treatment group of 14 participants is 8, and the population variance estimate based on a control group of 17 individuals is 9. Compute the pooled estimate of population variance. - 7.25 - 8.55 - 9.22 - 10.05
Statistics
Cohen's conventions for the t test for independent means are approximately _____ for a small effect size, ____ for a medium effect size, and ______ for a large effect size? - .1, .3, .5 - 2, 4, 6 - .2, .5, .8 - 3, 6, 9
Statistics
A sociologist interested in cultural differences compared women of two ethinic groups on a Role Approval Index (high scores mean high degrees of approval of one's social role). The results are as follows: Ethnic Group A: N = 15 M= 55 S2 = 6.5 Ethnic Group B : N = 23 M= 51 ...
Statistics
If the standard deviation of the distribution of the difference between means is .76, what is the t score? - (15 - 23) / 0.76 = -10.53 - (0.76)(15-23) = -8.00 - [(6.5 + 4.5)/2][0.76] = 4.18 - (55 - 51) / 0.76 = 5.26
Statistics
In an analysis of variance, if the null hypothesis is true then: - The research hypothesis is also true -You will need fewer participants for the experiment - There is less variance among the sample means than if the null hypothesis was not true - The within-group estimate of ...
Statistics
A mathematically defined curve that is the comparison distribution used in ANOVA is called the: - Normal distribution - Chi Square distribution - F distribution - T distribution
Statistics
Suppose a researcher wants to study the effectiveness of a new reading program for students who have not acquired the necessary reading skills by the time they reach the 8th grade. A randomly selected group of 50 students from a local junior high with poor reading skills will ...
Statistics
S2Within" equals: - the sum of squares within each group - the square root of the standard within-group deviations from the mean - the squared variance within groups - the population variance estimate based on the variation within each of the groups.
statistics
What tools can be used to collect data? What are some of the issues that occur with data collection? Are some tools more appropriate for collecting certain types of data and why?
Statistics
Can "effect size" be determined without also knowing the population standard deviation?
statistics
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour fight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the other will fail? Show all steps ca...
Statistics
Joint probability density function is: x + y where 0<x<1 and 0<y<1 (0 elsewhere) Find variance of (30x + 25y) Answer is 11.48 --- My calculations Marginal probability density functions (same for x and y): f(x) = x + 1/2 over 0<x<1 f(y) = y + 1/2 over 0<y&l...
Statistics
x is a random variable with the probability function: f(X) = x/6 for x = 1, 2 or 3 the expected value of X is?
Statistics
A researcher interested in relationships developed a questionnaire that measures the degree of affection adult men feel for their fathers. She has found that for the general population the distribution is skewed to the right, the mean degree of affection is 60, and the standar...
Statistics
A school counselor tests the level of depression in fourth graders in a particular class of 20 students. The counselor wants to know whether the kind of students in this class differs from that of fourth graders in general at her school. On the test, a score of 10 indicates se...
Statistics
A researcher conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a particular job-skills training program. The cutoff "t" needed is -1.8333. The standard deviation of the distribution of me...
Statistics
r^2 the corelation squared measures how well the y hat is than just using y bar or the other way around... I don't remeber what r^2 measures I have what it means on my calculator but I still don't understand it My teacher told me it's basically somehting like how m...
Statistics
A researcher conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a particular job-skills training program. The cutoff "t" needed is -1.8333. The standard deviation of the distribution of me...
Statistics
A research article included the following table: Mean Score on Four Questionnarie Scales Before and After the Experimental Manipulation. Questionnaire Before After Change Dominance 18.42 16.31 -2.11 Independence 17.25 21.38 4.13** Conformity 18.97 17.20 -1.77* Nurturance 16.11...
Statistics
A researcher conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a particular job-skills training program. The cutoff "t" needed is -1.8333. The standard deviation of the distribution of me...
Statistics
A school counselor tests the level of depression in fourth graders in a particular class of 20 students. The counselor wants to know whether the kind of students in this class differs from that of fourth graders in general at her school. On the test, a score of 10 indicates s...
Statistics
A researcher interested in relationships developed a questionnaire that measures the degree of affection adult men feel for their fathers. She has found that for the general population the distribution is skewed to the right, the mean degree of affection is 60, and the standar...
Statistics
A researcher interested in relationships developed a questionnaire that measures the degree of affection adult men feel for their fathers. She has found that for the general population the distribution is skewed to the right, the mean degree of affection is 60, and the standar...
Statistics
I'm not sure how to do #3 in this PDF: tinyurl [.][com][slash] yefzpv8
statistics
What is a great topic to do a research paper on and apply statistics?
statistics
A research article included the following table: Mean Score on Four Questionnarie Scales Before and After the Experimental Manipulation. Questionnaire Before After Change Dominance 18.42 16.31 -2.11 Independence 17.25 21.38 4.13** Conformity 18.97 17.20 -1.77* Nurturance 16.11...
statistics
A research article included the following table: Mean Score on Four Questionnarie Scales Before and After the Experimental Manipulation. Questionnaire Before After Change Dominance 18.42 16.31 -2.11 Independence 17.25 21.38 4.13** Conformity 18.97 17.20 -1.77* Nurturance 16.11...
statistics
A school counselor tests the level of depression in fourth graders in a particular class of 20 students. The counselor wants to know whether the kind of students in this class differs from that of fourth graders in general at her school. On the test, a score of 10 indicates se...
statistics
A research article included the following table: Mean Score on Four Questionnarie Scales Before and After the Experimental Manipulation. Questionnaire Before After Change Dominance 18.42 16.31 -2.11 Independence 17.25 21.38 4.13** Conformity 18.97 17.20 -1.77* Nurturance 16.11...
statistics
A researcher interested in relationships developed a questionnaire that measures the degree of affection adult men feel for their fathers. She has found that for the general population the distribution is skewed to the right, the mean degree of affection is 60, and the standar...
statistics
A researcher interested in relationships developed a questionnaire that measures the degree of affection adult men feel for their fathers. She has found that for the general population the distribution is skewed to the right, the mean degree of affection is 60, and the standar...
Statistics (Multinomial)
For the multinomial distribution: Show that summation of the probability mass function across all possible values equals 1. Show via summation of the probability mass function that the expected value of Y_i = n * p_i The textbook that I'm using left the above as "exer...
statistics
If a dice is rolled one time, classical probability would indicate that the probability of a "two" should be 1/6. If the dice is rolled 60 times and comes up "two" only 9 times does that suguest that the dice is loaded? why or why not
Help (last question)
What topics are discussed on the webiste? Abuse Air Quality Alcohol, Drugs, Addictions Babies Before Pregnancy Breastfeeding Cancer Prevention CERV Child Safety Children Classes Clinics Communicable Diseases Community Events Dental Health Emergency Services / Services d'ur...
statistics
At a certain college, 15% of the students receieved an A in their required math cousre, 10% receieved an A in their required chemistry course, and 5% receieved an A in both. A student is selected at random. a.) What is the probability that he received an A in either chemistry ...
Statistics
Safety researchers, interested in determining whether the occupancy of a vehicle might be related to the speed at which the vehicle is driven, have observed the following speed (mph) measurements for two random samples of vehicles. Alone With Pass 64 44 50 52 71 54 55 48 67 69...
statistics
For the following data independent samples, could the null hypothesis that the population means are equal be rejected at the 0.05 level? Sample1 Sample2 Sample3 Sample4 15.2 10.2 14.9 11.5 12.2 12.1 13.0 13.1 15.0 8.5 10.8 11.5 14.6 8.1 10.7 6.3 9.7 10.9 13.3 12.0 13.6 10.6 8....
Statistics
A simple random sample of 25 has been collected from a normally distributed population for which it is know that o=17.0. The sample mean has been calculated as 342.0, and the sample standard deviation is s=14.9. Construct and interpret the 95% and 99% confidence intervals for ...
Statistics
From past experience, an airline has found the luggage weight for individual air travelers on its trans-Atlantic route to have a mean of 80 pounds and a standard deviation of 20 pounds. The plane is consistently fully booked and holds 100 passengers. The pilot insists on loadi...
Statistics
For df = 25, determine the value of A that corresponds to each of the following probabilites: a. P(t >- A)= 0.025 b. P(t <- A)= 0.10 c. P(-A <- t <- A)=0.99
statistics
Use Bayes' theorem to solve this problem. A storeowner purchases stereos from two companies. From Company A, 250 stereos are purchased and 1% are found to be defective. From Company B, 950 stereos are purchased and 10% are found to be defective. Given that a stereo is defe...
statistics
A professional basketball player has embarked on a program to study his ability to shoot foul shots. On each day in which a game is not scheduled, he intends to shoot 100 foul shots. He maintains records over a period of 40 days of practice, with the results below. Foul Shots ...
statistics
A machine used for packaging seedless golden raisins is set so that their standard deviation in the weight of raisins packaged per box is 0.25 ounce. The operations manager wishes to test the machine setting and selects a sample of 30 consecutive raisin packages filled during ...
statistics
State the value of the correct region for alpha = 0.01
statistics
Share the value of the correct region for alpha= 0.05
English
In the following viewpoint, David B. Muhlhausen argues that capital punishment should not be abandoned because it deters crimes, saves lives, and the majority of American citizens support its use. Additionally, he maintains that evidence does not support claims that racial dis...
statistics
At a certain college, 15% of the students received an A in their required math course, 10% receieved an A in their required chemistry course, and 5% received an A in both. A student is selected at random. a.) What is the probability that he received an A in either chemistry or...
statistics
Two flower seeds are randomly selected from a package that contains five seeds for red flowers and three seeds for white flowers. a.) What is the probability that both seeds will result in red flowers? b.) What is the probability that one of each color is selected? c.) What is...
205
The Death Penalty Should Not Be Abolished "Capital punishment produces a strong deterrent effect that saves lives." Muhlhausen argues that capital punishment should not be abandoned because it deters crimes, saves lives, and the majority of American citizens support ...
statistics
You forget to set your alarm with a probaility of .3. If you set the alarm it rings with the probabilty of .8. If the alarm rings, it will wake you on time to make your first class with the probability of .9. If the alarm does not ring, you wake in time for your first class wi...
statistics
A person owns both her own business and her own home and purchases a cariety of insurances to protect them. In any one year the probability of an insurance claim on the business is .4 and on the home is .05. Assuming that these are independent events, find the probability that...
statistics
At a certain college, 15% of the students received an A in their required math course, 10% received an A in their required Chemistry course, 5% received an A in both. A student is selected at random. a.) What is the probability tha he receieved an A in either Chemistry or Math...
statistics
The probability that a certain door is locked is.6. The key to the door is one of five unidentified keys hanging on a key rack. Two keys are randomly selected before approaching the door. What is the probability that the door may be opened without returning for another key?
statistics
Two flower seeds are randomly selected from a package tha tcontains five seeds for red flowers and three seeds for white flowers. a.) What is the probability that both seeds will result in red flowers? b.) What is the probability that one of each color is selected? c.) What is...
college CRT 205
Source 1 Title and Citation: Individuals can help reduce child abuse and neglect. Source Citation:Information, National Clearinghouse on Child Abuse and Neglect. "Individuals Can Help Reduce Child Abuse and Neglect." Child Abuse. Ed. Lucinda Almond. Current Controver...
Statistics
For df = 25, determine the value of A that corresponds to each of the following probabilites: a. P(t >- A)= 0.025 b. P(t <- A)= 0.10 c. P(-A <- t <- A)=0.99
Statistics
From past experience, an airline has found the luggage weight for individual air travelers on its trans-Atlantic route to have a mean of 80 pounds and a standard deviation of 20 pounds. The plane is consistently fully booked and holds 100 passengers. The pilot insists on loadi...
statistics
A simple random sample of 25 has been collected from a normally distributed population for which it is know that o=17.0. The sample mean has been calculated as 342.0, and the sample standard deviation is s=14.9. Construct and interpret the 95% and 99% confidence intervals for ...
statistics
why are measures of variability essential to inferential statistics
statistics
Suppose 1.5 percent of the antennas on new Nokia cell phones are defective. For a random sample of 200 antennas, find the probability that 5 or more will be defective
Statistics
A researcher interested in relationships developed a questionnaire that measures the degree of affection adult men feel for their fathers. She has found that for the general population the distribution is skewed to the right, the mean degree of affection is 60, and the standar...
Statistics
A researcher interested in relationships developed a questionnaire that measures the degree of affection adult men feel for their fathers. She has found that for the general population the distribution is skewed to the right, the mean degree of affection is 60, and the standar...
statistics
A box of marbles contains an equal number of red marbles and yellow marbles but twice as many green marbles as red marbles. Draw one marble from the box and observe its color. Assign probabilities to the elements.
Math/Statistics
I don't get how to do this...can anyone help? 1. In a large box are 20 ping-pong balls—10 of them are red and numbered 1 through 10, and the other 10 of them are green and also numbered 1 through 10. Two balls are selected from the box without replacement. 1. a.Find t...
Math
Identify the misuse or misrepresentation of statistics: “60% of all college students watch less than 2 hours of television per day.” This conclusion was reached by a college student after she had questioned 520 randomly selected students exiting the library. What is ...
statistics
1. In a large box are 20 ping-pong balls—10 of them are red and numbered 1 through 10, and the other 10 of them are green and also numbered 1 through 10. Two balls are selected from the box without replacement. 1. a.Find the probability that the first ball selected is red...
Statistics
When circuit boards used in the manufacture of compact disc players are tested, it is discovered that each has a 5% chance of being defective. Suppose that a batch of 25 of these circuit boards is randomly selected. Would this be binomial or poission distribution?
statistics
In a population of exam scores, a score of X=88 corresponds to z= +2.00 and a score of X=79 corresponds to z= -1.00. Find the mean and standard deviation for the population.
Statistics
Events A, B, and C are defines on sample space S. Their corresponding sets of sample points do not intersect and their union is S. Further, event B is twice as likely to occur as event A, and event C is twice as likely to occur as event B. Determine the probability of each of ...
statistics
Suppose a box of marbles contains an equal number of red marbles and yellow marbles but twice as amny green marbles as red marbles. Draw one marble from the box and observe its color. Assign probabilitites to the elements.
genetics
can u help me with this qs pure breeding white budgies were crossed with pure breeding yellow and green budgies. all the F1 offspring were yellow and green. the F1 was then testcrossed with pure breeding white budgies, and the offspring were as follows: Green and Yellow 25 Whi...
Statistics
A density curve like an inverted letter "V" The first segment goes from the point (0, .6) to the point (0.5, 1.4). The second segment goes from (.05, 1.4) to (1, .6) Find the percent of the observations that lie below .3 I have no idea how to do this If you could tel...
Statistics
I need help with this problem. I think I have some of the answers right but I'm not sure. There is a data set consisting of 33 whole-number observations. Its five number summary is (16, 20, 22, 30, 46) 1. How many observations are stricty less than 22? I think it is 16 bec...
math statistics/probability
can anyone show me how to work this problem out thanks in advance The Census Bureau provides data on the number of young adults, ages 18–24, who are living in their parents' home (the data include single young adults who are living in college dormitories because it is...
college math statistics
Hello I am having trouble trying to figure out how to do the last 2 questions in this word problem In an article about investment growth, Money magazine reported that drug stocks show powerful long-term trends and offer investors unparalleled potential for strong and steady ga...
math statistics/probability
Hello I am having trouble trying to figure out how to do the last 2 questions in this word problem In an article about investment growth, Money magazine reported that drug stocks show powerful long-term trends and offer investors unparalleled potential for strong and steady ga...
math statistics
Hello I am having trouble trying to figure out how to do this probability word problem: In an article about investment growth, Money magazine reported that drug stocks show powerful long-term trends and offer investors unparalleled potential for strong and steady gains. The fe...
statistics
List Six deceptive graphical techniques.
statistics
A researcher interested in relationships developed a questionnaire that measures the degree of affection adult men feel for their fathers. She has found that for the general population the distribution is skewed to the right, the mean degree of affection is 60, and the standar...
Statistics
The Econ Dpt final has 30 questions that are multiple choice. There are 5 possible answers. If you guessed the answers to all the questions, how many would you expect to get right. Choices are 6, 7.5, 7?
math
Is there an easy way to tell what graph I should use for questions like this? The following is a list of product manufacturing levels for the 50 states in 2004 ($ millions): 76, 5, 42, 55, 388, 34, 45, 17, 84, 131, 5, 17, 210, 184, 79, 56, 97, 124, 14, 36, 77, 220, 88, 44, 103...
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