Wednesday
August 24, 2016

Homework Help: Math: Statistics

Recent Homework Questions About Statistics

statistics
Select the TWO options that are TRUE statements about two-sample t-tests. Select one or more: The same formula is used for the ESE (estimated standard error) in the two-sample t-test with a common variance and the two-sample t-test with unequal variances. A researcher has ...
Tuesday, August 23, 2016 by mina

statistics
a bag contains 4 blue marbles,6 red marbles, 10 yellow marbles and 6 green marbles.What is the probability of not drawing a red marble?
Tuesday, August 23, 2016 by dennis

statistics
Select the TWO options that are TRUE statements about two-sample t-tests. Select one or more: The same formula is used for the ESE (estimated standard error) in the two-sample t-test with a common variance and the two-sample t-test with unequal variances. A researcher has ...
Sunday, August 21, 2016 by mina

Business statistics
You chose a simple random sample of 300 guests you develop a 95 percent confidence interval estimate you found the following 325 and 32 determine the standard error of the sampling distribution determine the critical value z from the standard normal table compute the ...
Sunday, August 14, 2016 by Kim

Statistics
Survey of 115 families chosen at random, having 5 children it was observed that the distribution was as follows The 5 children are girls is 6 There is one boy and four girls is 18 There are two boys and three girls is 35 There are three boys and two girls is 30 There are four ...
Saturday, August 13, 2016 by Huruva Nomore

probability statistics
how many bridge hands are possible containing 4 spaders, 6 diamonds , 1 club and 2 heart?
Saturday, August 13, 2016 by jamie

probability statistics
how many numbers between 4000 and 7000 can be choosen using digita 0,1,2,3,4,5,6,7 and 8 if each digit must not be repeated in any numbers?
Friday, August 12, 2016 by jhenny

statistics
how many arrangements can be made from the word MATHEMATICS when all are taken at a time ?
Friday, August 12, 2016 by jella

math
Based on the data collected by the National Centre for health Statistics and made available to the public in the Sample Adult database, it was found that the percentage of adults who have at some point in their life been told that they have hypertension was 15%. Suppose that a...
Thursday, August 11, 2016 by lucia

probability statistics
A jar contains 6 red, 7 white, and 7 blue marbles. If a marble chosen at random. Find the following probabilities? A)P(red) B)P(white) C)P(red or blue) D)P(red and white)
Wednesday, August 10, 2016 by charles

statistics
i have a little bit of trouble finding the first and second quartile of this data set:78,91,88,83,84. I know my median is 88,but i cannot see a way to find Q1 ad Q3,plz help!!😄
Monday, August 8, 2016 by Mirandal

Applied Stats
Based on the data collected by the National Centre for health Statistics and made available to the public in the Sample Adult database, it was found that the percentage of adults who have at some point in their life been told that they have hypertension was 24 percent. Suppose...
Monday, August 8, 2016 by Anonymous

statistics
A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively; each unit of B requires 3, 4 and 1 kilograms of ...
Monday, August 8, 2016 by mary

statistics
a survey conducted by the u.s department of labor found the 48 out of 500 heads of house holds were unemployed compute a 99% confidence interval for the proportion of unemployed heads of households what is the upper and lower limits round the answers to three decimals
Friday, August 5, 2016 by bernie

statistics
the diameter of red apples of an orchard have a normal distribution with a mean of 3 inches ans standard deviation of 0.5 inches one apple will be randomly chosen. what is the probability of picking an apple with a diameter less than 2.15 inches
Tuesday, August 2, 2016 by bernie

Statistics
A production line operation is designed to fill cartons with laundry detergent to a mean weight of 32 ounces. A sample of cartons is periodically selected and weighed to determine whether underfilling or overfilling is occurring. If the sample data lead to a conclusion of ...
Saturday, July 30, 2016 by Gary

statistics
in a certain college 33% of the physics majors belong to ethnic minorities. if 8 students are selected at random from the physics majors what is the probability that more than 5 belong to an ethnic minority
Saturday, July 30, 2016 by bernie

statistics
i made a typo i meant to say what is the probability that both are obese
Friday, July 29, 2016 by bernie

statistics
according to the health and exam survey (1999-2008)35.7% of u.s adults were consdered obese(body mass greater then30)if two people in the u.s are selected at random is the probability that both are obese
Friday, July 29, 2016 by bernie

statistics
twenty light bulbs are tested three light bulbs fail the test. two light bulbs are selected at random without replacement from this collection of bulbs find the probablilty that both light bulbs failed the test. round the answer 3 decimals places
Friday, July 29, 2016 by bernie

statistics
can someone help me with the question i asked please thank you
Friday, July 29, 2016 by bernie

statistics
twenty light bulbs are tested to see if they claims last long as the manufacturers claims they do. three light bulbs failed the test. two light bulbs are selected at random without replacement from this collection of bulbs find the probability that both light bulbs failed the ...
Friday, July 29, 2016 by bernie

statistics
can i get help with my question thank you
Friday, July 29, 2016 by bernie

Statistics
The ages of commercial aircraft are normally distributed with a mean of 13.5 years and a standard deviation of 7.3 years. What percentage of individual aircraft have ages greater than 15 ​years?
Tuesday, July 26, 2016 by Shawn

statistics
y=8+13x
Monday, July 25, 2016 by william

statistics
2424​% of college students say they use credit cards because of the rewards program. You randomly select 10 college students and ask each to name the reason he or she uses credit cards. Find the probability that the number of college students who say they use credit ...
Monday, July 25, 2016 by Anonymous

Statistics
Assume that​ women's heights are normally distributed with a mean given by mu equals 63.8 inμ=63.8 in​, and a standard deviation given by sigma equals 3.1 inσ=3.1 in. Complete parts a and b.
Sunday, July 24, 2016 by Keith

statistics
find the number of units that must be produced to break even. R(x)=200x - x^2 C(x)= 70x +2200 0 < x < 100 (These < are supposed to b less than or equal to signs)
Wednesday, July 20, 2016 by Anonymous

statistics
What is straight line depreciation for an item that costs $15,951. whose life is 13 years?
Wednesday, July 20, 2016 by Anonymous

statistics
2) sue, a botanist, is studying a new plant seed. if it is known that these seeds have a 95% probability of germinating. if sue plants 6 seeds, what is the probability that; a) exactly four seeds will germinate? b) at least five will germinated? c) at most one will not ...
Monday, July 18, 2016 by nancy

statistics
sue, a botanist, is studying a new plant seed. if it is known that these seeds have a 95% probability of germinating. if sue plants seeds, what is the probability that; a) exactly four seeds will germinated? b) at least five will germinated? c) at most one will not germinated?
Sunday, July 17, 2016 by nancy

statistics
A basketball player makes 60% of the free throws that he attempts, except that if he has just tried and missed a free throw then his chances of making a second one go down to only 30%. Suppose he has just been awarded two free throws. Find the probability that he makes both. ...
Saturday, July 16, 2016 by john

statistics
sue, a botanist, is studying a new plant seed. if it is known that these seeds have a 95% probability of germinating. if sue plants seeds, what is the probability that; a) exactly four seeds will germinated? b) at least five will germinated? c) at most one will not germinated?
Saturday, July 16, 2016 by nancy

statistics
If 6 bass are randomly selected from Clear Lake, find the probability that the mean weight is greater than the mean of those you caught
Wednesday, July 13, 2016 by Anonymous

statistics
In a shipment of mangoes , 90
Wednesday, July 13, 2016 by che

statistics
If P(A)=11/13, find P(Ā) Find the indicated probability
Monday, July 11, 2016 by Anonymous

Math
2. The following is a random sample of grades achieved on statistics examination by 10 male students in a very large class and a random sample of grades achieved by 8 female students. Male 78 87 75 64 90 80 65 86 74 81 Female 71 50 80 75 90 61 85 81 Test at  = 0.01 ...
Sunday, July 10, 2016 by Paulo

statistics
A large school district would like to estimate the mean score for all of its 5th grade students on a certain mathematics achievement test known to produce scores that are normally distributed in this population. In a pilot study, n = 25 randomly selected 5th graders take the ...
Saturday, July 9, 2016 by ella

Statistics
A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if he wishes the estimate to be within four percentage points with 99 ​% confidence, ...
Wednesday, July 6, 2016 by Zechariah

statistics
A jar contains 2 red balls, 2 blue balls, 2 green balls and 1 orange ball. Balls are randomly selected, without replacement, until 2 of the same colour are obtained. Calculate the probability that more than 3 balls must be selected.
Saturday, July 2, 2016 by peter

Reserach Statistics in CRJU
A data set has n=10 pairs of X and Y values. This data has SSx=10, SSy= 20 and SP=10. Compute the Pearson correlation and explain r=sp/√ssx ssy = 10/√10*20= 10/√200 Simplify 200 under radical= 200 as 10^2⋅2. √(〖10〗^2 )×2= 10/...
Thursday, June 30, 2016 by Michelle

C++
My assignment: 1- Rewrite your C++ program in Project 1 to compute the number of words, average length and lengths of the words in the text file words.txt – the input file. Each line in the input file contains exactly one word. The words in the input file are sorted ...
Thursday, June 30, 2016 by Josh

Statistics
In a sample of 1000 tires, with a mean of 250 miles per tire....about how many tires will last longer than 300 miles?
Thursday, June 30, 2016 by Wade

Statistics
example of a finished apa independent project with between subjects and analysis of variance
Friday, June 24, 2016 by KT

Statistics
Choose and observational study for and independent project using 3 between subjects and Anova
Friday, June 24, 2016 by KT

Probability and statistics
Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way Galaxy in the vicinity of our solar system is 1 star per 16 cubic light years. (a) What is the probability of 3 or more stars in 16 cubic light years? (b...
Thursday, June 23, 2016 by Sarah

statistics
a student takes a true false test that has 13 questions and guesses randomly at each answer. Let X be the number of questions answered correctly. Find P(fewer than 4)
Wednesday, June 22, 2016 by debbie

Statistics
many ground level plants in tropical rainforest have adapted to the shade of the forest canopy. these plants tend to function well as house plants since they require minimal sunlight. A botanist is interested in domesticating a particular plant found in the amazon rainforest...
Wednesday, June 22, 2016 by mia

Statistics
a sample of n=25 scores has a mean of M=65 and an estimated standard error of 2 points. What is the sample variance
Wednesday, June 22, 2016 by L

English
Complete the following sentence. _____ often answer the questions who, what, why, when, or where. Supporting details (MY ANSWER) Statistics Reading strategies Graphic organizers
Tuesday, June 21, 2016 by Nikki

statistics
A coin is biased so that the probability of obtaining a head is 2/3. The coin is tossed four times. Find the probability of obtaining exactly two heads.
Tuesday, June 21, 2016 by Laura

statistics
. What is inferred by the 95% confidence interval of the mean?
Friday, June 17, 2016 by Anonymous

statistics
A study was performed on green sea turtles inhabiting a certain area. Time-depth recorders were deployed on 6 of the 76 captured turtles. The time depth recorders allowed the scientists to track the movement of turtles in the area. The 6 turtles had a mean shel length of 51.2 ...
Thursday, June 16, 2016 by PLEASE HELP ME

statistics
the verbal section of GRE exam for admission into graduate school has a mean of 456 (s=140). Assuming the scores are normally distributed what percent of students will score 600 or higher? (choose range that fits your answer)
Thursday, June 16, 2016 by marisa

Civics
Speaker 2: The law would make anyone who looks under 18 without an ID after dark into a criminal. That's not the answer; that's a police state. Confining innocent youth to house arrest does not make young people more responsible. Jan decides to do some more research on...
Wednesday, June 15, 2016 by Frisk

statistics
For a population with a mean of 80 and a standard deviation of 10, what is the Z score corresponding to an individual score of 95?
Wednesday, June 8, 2016 by tonya

Economics
A student taking economics, statistics, and finance has decided to spend 9 hours per week studying. The objective is to maximize the average grade, which means maximizing the total grade in the three courses. 1. How should the student allocate her time
Wednesday, June 8, 2016 by tonya

Statistics
If is confirm that two thirds of the students of a college are females, calculate the probability that on entering the college, the first two students one meet are (i) the same gender (ii) different gender
Monday, June 6, 2016 by Danbaba

Statistics
We investigate if a period of time feels longer or shorter when people are bored compared to when they are not bored. Using independent samples, we obtain these estimates of the time period (in minutes):
Saturday, June 4, 2016 by Kassi

statistics
the amount of pyridoxine in grams per multiple vitamin is normally distributed with mean = 110 grams and standard deviation = 25 grams. What is the probability that a randomly selected vitamin will contain between 100 and 110 grams of pyridoxine?
Friday, June 3, 2016 by james

Vocabulary
A large group of homes A. Development B. Technology C. Communication D. Statistics B?
Thursday, June 2, 2016 by quick help needed

Vocabulary
Building and construction A. Nursing B. Architecture C. Teaching D. Statistics B?
Thursday, June 2, 2016 by quick help needed

Statistics
Find the number x such that the proportion of observations that are less than x in a Normal distribution with mean 100 and standard deviation 25 is 0.3. (Use 2 decimal places.)
Tuesday, May 31, 2016 by Sarah Lacks

Statistics
Suppose a fair coin is tossed five times and let x be the number that turned up in those five times. **the mean and the standard deviation are respectively... a.) 0.5, 0.5 b.) 2.5, 0.5 c.) 2.5, 2.24 d.) 2.5, 1.12 **find P(x≥1) a.) 0.5 b.) 1.0 c.) 0.03 d.) 0.97 * i just ...
Monday, May 30, 2016 by Caitlyn

statistics
How large a sample is needed to be able to estimate the proportion to within plus or minus 3% and be 95% sure the estimate is correct? frame contains approximately 25,000.do not take nonresponse into account.
Sunday, May 29, 2016 by Garth

Statistics
A certain disease occurs in 4% of the population. A blood test for this disease shows a false positive 12% of the time. That means a test will show positive given that the person does not have the disease. What is the probability that a person tests positive but does not have ...
Wednesday, May 25, 2016 by Ashley

statistics
2. At a local university, a sample of 49 evening students was selected in order to determine whether the average age of the evening students is significantly different from 21. The average age of the students in the sample was 23 years. The population standard deviation is ...
Tuesday, May 24, 2016 by raj

Statistics
A breathalyser test is used by police in an area to determine whether a driver has an excess of alcohol in their blood. The device is not totally reliable: 7 % of drivers who have not consumed an excess of alcohol give a reading from the breathalyser as being above the legal ...
Friday, May 20, 2016 by John

Statistics
A certain type of lightbulb is advertised to have an average lifetime of 1,000 hours. Assume the lifetimes of these lightbulbs are approximately normally distributed with a standard deviation of 250 hours. A) Find the percentage of lightbulbs that will fail during their first ...
Friday, May 20, 2016 by Kerry

statistics
Consider the data below: 33.1068240, -6.3331469, 22.2903011, -6.9142991, -21.7899524, -12.1741625, 29.2973275, -34.2364631, -4.4113930, -25.7845033, -12.0375226, 17.9397860, -6.2030667, 0.3504070 , -19.4854146, -10.5979710, -27.1274107, 20.4247578, 17.0975034, -6.8416016, 0....
Thursday, May 19, 2016 by lisa

statistics
Z = 1.5. The mean and variance of the corresponding X are 1.3 and 5.6. Compute X:
Thursday, May 19, 2016 by lisa

statistics
Consider the data from an unknown distribution: 40.68, 32.15, 36.91, 29.00, 35.58, 41.55, 33.83, 29.07, 41.00, 37.68, 41.23, 37.54, 40.33, 36.82, 35.18, 31.67, 38.55, 38.34, 35.86, 40.45, 37.28, 36.65, 32.12, 32.96, 37.65, 39.44, 46.18, 24.21, 42.35, 33.05, 30.90, 42.12, 34.38...
Thursday, May 19, 2016 by lisa

statistics
A sample of blood is assayed for its alcohol content (BAC). The following BAC values are determined from six trials: 0.081%, 0.078%, 0.079%, 0.076%, 0.082%, 0.077% Assume the data follows a Gaussian distribution. For 84% of the possible assay data population determine with 93...
Thursday, May 19, 2016 by lisa

statistics
Z = 1.5. The mean and variance of the corresponding X are 1.3 and 5.6. Compute X:
Thursday, May 19, 2016 by lisa

Statistics
A health care professional wishes to estimate the birth weights of infants. The standard deviation of the birth weights is known to be 8 ounces. How large a sample must she select if she desires to be 95% confident that the true mean is within 6 ounces of the sample mean?
Thursday, May 19, 2016 by Api

statistics
Z is a standard normal random variate. For Pr(c < Z) = 0.278, what is the value for c?
Wednesday, May 18, 2016 by lisa

statistics
4.6 is a N(3.5, 1.2) random variable. What is its standard value, Z?
Wednesday, May 18, 2016 by lisa

statistics
A particular fruit's weights are normally distributed, with a mean of 594 grams and a standard deviation of 16 grams. If you pick a fruit at random, then 18% of the time, their mean weight will be greater than how many grams?
Wednesday, May 18, 2016 by pierce college

Stat
For a recent year the following are the numbers that occurred each month in a city. use a .05 significance level to test the claim that homicides in the city are equally likely for each of the 12 months calculate test statistics, x^2 and p value Month. Number. Month. Number ...
Monday, May 16, 2016 by I don't know what to do help

Statistics
In a poll, respondents were asked whether they had ever been in a car accident. 220 respondents indicated that they had been in a car accident and 370 respondents said that they had not been in a car accident. If one of these respondents is randomly selected, what is the ...
Sunday, May 15, 2016 by Kimmie ;)

Statistics
The time it takes me to wash the dishes is uniformly distributed between 11 minutes and 17 minutes. What is the probability that washing dishes tonight will take me between 12 and 14 minutes? Give your answer accurate to four decimal places.
Sunday, May 15, 2016 by Vic

Math (Statistics)
12. Clancy, Rowling, Tolstoy Readability: Pages were randomly selected by the author J.K.Rowling, Leo Tolstoy, and Tom Clancy books. Use a 0.05 significance level to test the claim that the three samples are from populations with the same mean. Do the books appear to have ...
Sunday, May 15, 2016 by Lexi

Math (Statistics)
Determine whether a probability distribution is given. If a probability distribution is given, find its mean and standard deviation. If a probability distribution is not given, identify the requirements that are not satisfied. 8. Male Color Blindness: When conducting research ...
Sunday, May 15, 2016 by Lexi

Statistics Homework
10. In a Microsoft Instant Messaging survey, respondents were asked to choose the ,most fun way to flirt, and the accompanying table is based on the results. X P(x) E-mail 0.06 In person 0.55 Instant Messaging 0.24 Text Messaging 0.15
Sunday, May 15, 2016 by Lexi

Statistics Please HELP
IQ Scores: Use the listed IQ scores. IQ tests are designed so that the mean IQ of the population is 100. Does the sample mean suggest that the sample is consistent with the population? IQ: 96 89 87 87 101 103 103 96 127 126 101 96 93 88 94 85 97 114 113 124
Saturday, May 14, 2016 by Lexus

Stats Homework Please Help!!!
Statistics Homework Help! Statistics Question Political Contributions: Listed below are contributions (in dollars) made to the two presidential candidates in a recent election. All contributions are from the same zip code as the author, and the data are from the Huffington ...
Saturday, May 14, 2016 by Lexus

Math Statistics
26. Flight Data: Use the times required to taxi out for takeoff. For American Airlines, how is it helpful to find the mean? Taxi Out: 30 19 12 19 18 22 37 13 14 15 31 15 16 14 15 27 19 22 22 23 16 13 16 18 15 12 19 18 21 20 13 15 43 18 17 19 13 20 12 17 35 19 22 43 49 45 13 23
Friday, May 13, 2016 by Lexus

Statistics Mean and Median Question
Statistics Find The Mean and Median Question 28. IQ Scores: Use the listed IQ scores. IQ tests are designed so that the mean IQ of the population is 100. Does the sample mean suggest that the sample is consistent with the population? IQ: 96 89 87 87 101 103 103 96 127 126 101 ...
Friday, May 13, 2016 by Lexus

Statistics Homework
Statistics Question: Years to Earn Bachelor's Degree Years to Earn Bachelor's Degree: Listed below are the lengths of time (in years) it took for a random sample of college students to earn bachelor's degrees (based on data from the National Center for Education ...
Friday, May 13, 2016 by Lexus

statistics
A survey of 50 lobster fishermen on Funafuti (an island in Tuvalu), found that they catch an average of 32 pounds of lobster per day with a standard deviation of four pounds. If a fisherman is selected randomly, what is the probability that his catch is less than 20 pounds?
Thursday, May 12, 2016 by Qwenie

Statistics
If someone will explain how to work these problems out, that'll help me a ton! A weight loss program claims their patients loose an average of 3 pounds during the first month of the program but a consumer group believes the number is higher than that. A random sample of 8 ...
Tuesday, May 10, 2016 by lviiii

Statistics Range, Variance, and Standard Deviation
26. Flight Data: Find the range, variance, and standard deviation. Express answers using appropriate units, such as "minutes." Refer to Data Set 15 in Appendix B and use the times required to taxi out for takeoff. Flight 1 1 1 1 1 1 1 1 1 1 1 1 3 3 3 3 3 3 3 3 3 3 3 ...
Tuesday, May 10, 2016 by Alexis

Statistics Homework
Political Contributions: Listed below are contributions (in dollars) made to the two presidential candidates in a recent election. All contributions are from the same zip code as the author, and the data are from the Huffington Post. Do the contributions appear to favor either...
Tuesday, May 10, 2016 by Alexis

Statistics
Years to Earn Bachelor’s Degree: Listed below are the lengths of time ( in years) it took for a random sample of college students to earn bachelor’s degrees ( based on data from the U. S. National Center for Education Statistics). Based on these results, does it ...
Tuesday, May 10, 2016 by Alexis

Math statistics
What is the probability of randomly selecting a female from the 25 and 35 years old
Monday, May 9, 2016 by Anonymous

Statistics
The mean life expectancy of a certain type of light bulb is 945 hours with a standard deviation of 21 hours. What is the approximate standard deviation of the sampling distribution of the mean for all samples with n=50?
Monday, May 9, 2016 by tf9346

statistics
A zip-code is a five-digit number identifying where in the U.S. an address is located. The first four digits in a zip code can be any number 0-9, but the fifth digit cannot be 0. In addition to this, each address has a “plus-four” code that more specifically ...
Sunday, May 8, 2016 by Anonymous

Statistics Algebra 2
A 10-question multiple choice test has 4 possible answers for each question. A student guesses on all ten answer. a)What is the probability that the student selects at least 6 correct answers? b)Is getting exactly 10 questions correct the same probability as getting exactly ...
Sunday, May 8, 2016 by Dloc

Statistics
Can someone help/check with these questions. I did majority of the work. but some i need help with. Are the mean number of times a month a person eats out the same for whites, blacks, Hispanics and Asians? Suppose that Table 13.26 shows the results of a study (listed below) ...
Thursday, May 5, 2016 by Davina

Statistics
In a simple random sample of 80 patients that go to a certain dentist, 9 patients had their teeth whitened. which interval is the 95% confidence interval for the percent of all the dentist's patients who had their teeth whitened? (4.4, 18.2) (8.4, 14.2) (5.5, 17.1) (7.8, ...
Thursday, May 5, 2016 by Clay

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Homework Help: Math