Friday
October 21, 2016

# Homework Help: Math: Statistics

## Recent Homework Questions About Statistics

Behavioral Statistics
Because Foofy's score had a relative frequency of .02, she claims she had one of the highest scores on the exam. Why is she correct or incorrect?
Sunday, January 31, 2016 by Nik

statistics
You measure 64 children, obtaining a X of 57.28. Slug says that bc this X is so close to the mean of 56, this sample could hardly be considered gifted . A. Perform the appropriate statical procedure to determine whether he is correct. B. In what percentage of the top scores is...
Saturday, January 30, 2016 by pam

statistics
Company stock price of which has risen so that over the past ten trading days , it's mean selling price is \$ 14.89 . Over the years the mean price of the stock has been 10.43 ( sigma = 5.60 ) you wonder if the mean selling price is over the next ten days to go higher . ...
Saturday, January 30, 2016 by pam

statistics
For the data 95 10 7 9 10 11 8 12 7 6 9, find the raw scores that correspond to the following : z= +1.22; z= -0.48
Saturday, January 30, 2016 by pam

Statistics
Suppose that for x = 3, the predicted value is y = 7. The data pair (3, 10) is part of the sample data. What is the value of the residual for x = 3?
Thursday, January 28, 2016 by mike

Statistics
A study was conducted to investigate the relationship between the resale price, y (in hundreds of dollars), and the age, x (in years), of midsize luxury American automobiles. The equation of the line of best fit was determined below. y = 179.3 − 20.78x (a) Find the ...
Thursday, January 28, 2016 by Greg

statistics
Identify the conditions of the independent variable , the dependent variable , their scales of measurement , which measure of central tendency and variability to compute and which scores you would use in the computation . We test whether participants laugh longer ( in seconds...
Saturday, January 23, 2016 by pam

statistics
Ms.Sue What 2 aspects of the data determine which measure of central tendency use?
Thursday, January 21, 2016 by pam

statistics
What 2 aspects of the data determine which measure of central tendency use?
Thursday, January 21, 2016 by pam

Statistics
Hello, I need to analyze an experiment... could you help me? Stewart Fist reported the results of an experiment investigating the link between cell phone use and tumors in mice. the study exposed 100 mice to cell phone radiation for 2 1/2 hour periods each day for 18 months. ...
Thursday, January 21, 2016 by Scarlett

statistics
A customer service division of a telecommunications firm receives 100 mobile phones for repair on a particular week. 18 of the phones are less than a year, 60 phones are more than a year but less than 2 years and the rest are older than 2 years. The company provides warranty ...
Wednesday, January 20, 2016 by Anonymous

probability and statistics
how many different plate numbers can be made using the letters A,B and numbers 0,1,2,3 if each must contain 2 letters and 3 numbers.
Wednesday, January 20, 2016 by jhay

statistics/ mean median mode
What 2 aspects of data determine which measure of central tendency to use ?
Tuesday, January 19, 2016 by pam

statistics/ mean median mode
Describe one personal score for each type of measurement scale (ratio, interval , ratio, ordinal) how the score relates/related to the appropriate measure of central tendency (mean, mode, median ). Miles per month that you spend commuting GPA of several terms/year Average ...
Tuesday, January 19, 2016 by pam

statistics/ mean median mode
1. What two aspects of the data determine which measure of central tendency to use? 2. Why is it best to use the mean with a normal distribution ? Questions are from chapter 4 Basic Statistics for the Behavioral Sciences 7th edition
Tuesday, January 19, 2016 by pam

statistics
1. What two aspects of data determine which measure of central tendency to use? 2. Why is it best to use the mean with a normal distribution ?
Tuesday, January 19, 2016 by pam

Statistics
What do i do to calculate the 25% mean of 50 variables? Like, how many do I take away from the smallest and largest sides?
Tuesday, January 19, 2016 by Anne

Statistics
The intermediate answers from some calculations based on whole number scores are X= 4.3467892 and Y= 3.3333. For the next step, after rounding, what values of X and Y do we use?
Sunday, January 17, 2016 by Pam

STATISTICS
A random sample of clients at a weight loss center were given a dietary supplement to see if it would promote weight loss. The center reported that the 100 clients lost an average of 34 pounds, and that a 95% confidence interval for the mean weight loss this supplement ...
Friday, January 15, 2016 by Anonymous

statistics
in a shipment of 7 items there are three defective items. at random 4 items are selected what is the expected number of defective items?
Friday, January 15, 2016 by arun

statistics
5 men, 1 woman and a chold are to be seated around a round table with seven seats. Find the no. of ways they may have be arranged if the woman and the child must sit together.
Friday, January 15, 2016 by im

statistics
A marketing research shows that for every 100 flyers distributed to potential customers, 1.2 customers will be captured. If 10000 flyers are being distributed, find a. the probability that 150 customers are captured b. the expected value of this probability distribution
Tuesday, January 12, 2016 by Anonymous

Statistics
what is the standard deviation for 57,61,57,57,58,57,61
Sunday, January 10, 2016 by jean

Statistics
Find the interquartile range given these data points: 57,66,69,71,72,73,74,77,78,7879,79,81,81​,82,83,83,88,89,94. When I used the TI-84 calculator, I got ... Q1=72.5 Q3=82.5 IQR=Q3-Q1=82.5-72.5=10 But.. When I created a stem and leaf plot I found that Q2= (78+79)/2 =78....
Thursday, January 7, 2016 by Sanaya

Statistics
Find the interquartile range given these data points: 57,66,69,71,72,73,74,77,78,7879,79,81,81​,82,83,83,88,89,94. When I used the TI-84 calculator, I got ... Q1=72.5 Q3=82.5 IQR=Q3-Q1=82.5-72.5=10 But.... When I created a stem and leaf plot I found that Q2= (78+79)/2 =...
Thursday, January 7, 2016 by Sanaya

Statistics
Will somebody help me find statistics on the spread of AIDS from its discovery to the present?
Wednesday, January 6, 2016 by Victoria

statistics
The pie chart below shows how the total annual income for a certain family is spent. If the total annual income is , what amount is budgeted for Savings and Insurance combined?
Monday, January 4, 2016 by donna

Statistics
The coefficient of correlation between the age and blood pressure of a sample of 8 persons was found to be +0.8, the average age is 50 years and average blood pressure is 60. Their standard deviations were 5 and 10 respectively. a) Obtain the two regression equations b) find ...
Saturday, January 2, 2016 by Sara

English
What is Szymborska's overall opinion of humanity in "A Contribution to Statistics?" Support your response with at least two details or quotes from the poem. ___ I'm kind of torn on this one, because I want to say it's a pessimistic tone on humanity...but ...
Saturday, January 2, 2016 by Michael

statistics
Q- Two samples of sizes 8 and 10 are drawn from two normally distributed population having variance 20 and 36 respectively. Find the probability that the variance of the first sample is more than twice the variance of the second sample.
Saturday, January 2, 2016 by Vivaan

Statistics
Chances are 50-50 that a newborn baby will be a girl. For families with five children, what is the probability that all the children are girls? So far I have: 2X2X2X2X2=32
Thursday, December 31, 2015 by Fran

stats
On the eleventh day of Statistics, my teacher gave to me… eleven pipers piping. While these popular pipers are on tour piping, one piper is randomly selected to win tickets for his immediate family to the show. The breakdown of the number of tickets required follows: (2/...

stats
On the ninth day of Statistics, my teacher gave to me --- nine ladies dancing. These nine ladies dancing are the backup dancers for In Sync. It is well known that if dancers don’t warm up adequately before dancing, the dancers will be Out of Sync and may sustain injuries...

stats
On the seventh day of Statistics, my teacher gave to me --- seven swans a-swimming. But can they swim faster than American Olympic gold medallist Michael Phelps? Michael can swim the 200 meter butterfly in 1 minute 54 seconds (which is 114 seconds). In the same event, the swim...
Sunday, December 27, 2015 by HELP

Statistics
On the sixth day of Statistics, my teacher gave to me, six geese-a-laying. The eggs they were a-laying were normally distributed and had a mean of 7cm and standard deviation of 2cm. What is the probability that if you randomly select one egg from each of the six geese, the ...
Saturday, December 26, 2015 by Anonymous

statistics
On the sixth day of Statistics, my teacher gave to me, six geese-a-laying. The eggs they were a-laying were normally distributed and had a mean of 7cm and standard deviation of 2cm. What is the probability that if you randomly select one egg from each of the six geese, the ...
Saturday, December 26, 2015 by Anonymous

Statistics
On the fifth day of Statistics, my teacher gave to me….five golden rings. The rings from which she could select were: 10 golden rings, 5 silver rings and 3 platinum rings. Knowing that your Statistics teacher would naturally have randomly selected the rings, what is the ...

Stats
On the fourth day of Statistics, my teacher gave to me….four calling birds. They weren’t calling birds until they each got a cell phone. Each of the birds randomly selected their phone service independently and got together for lunch (seeds, of course – they are...

stats
On the third day of Statistics, my teacher gave to me….three French hens. Because she is in a hurry, she randomly selects three pets from the local pet store. Find the probability that she selected three French hens. Hens Chickens French 10 20 American 30 40 In order to ...

Statistics
On the third day of Statistics, my teacher gave to me….three French hens. Because she is in a hurry, she randomly selects three pets from the local pet store. Find the probability that she selected three French hens. Hens Chickens French 10 20 American 30 40 In order to ...
Wednesday, December 23, 2015 by Danny

statistics
On the second day of Statistics, my teacher gave to me….two turtle doves. The pet store that my Statistics teacher frequents has 25 doves, of which 8 are turtle doves. (See * below. This is not a trick question as turtle doves really do exist. If you are visualizing a ...
Monday, December 21, 2015 by Nicole

statistics
I have a statistics math problem. if someone could answer. "A basketball player makes 70% of free throws. he throws 15 free shots. what is the probability that the basketball player makes 7 or more free shots inside basket."
Monday, December 21, 2015 by jennifer

statistics
If the mean value of the weight of a particular brand of dog food is 20.6 lb and the standard deviation is 1.3, assume a normal distribution and calculate the amount of product that falls below the lower specification value of 19.7 lb
Monday, December 21, 2015 by sam

Statistics
Having trouble with these four questions: 1. Given the rules of the different games of chance described in the sheet you downloaded, think about your odds of winning in each of these three scenarios: A. Craps: Either roll or a 7 or 11 on the first roll, OR match the point ...
Thursday, December 17, 2015 by Tim

Statistics
Across the USA, results for these exams are normally distributed. What does that mean and why is this the case? If you were to create a histogram of all GRE scores, what would you expect the histogram to look like? Would it be symmetrical? Would it be bell shaped? How many ...
Wednesday, December 16, 2015 by Natasha

Statistics
Suppose a college entrance exam has a mean of 1200 and a standard deviation of 100. An Ivy league college will only take applicants in the 90% percentile or higher. what is the lowest score they would need on the entrance exam?
Wednesday, December 16, 2015 by Trisha

Statistics
The repair cost for a certain model of laptop computer has a normal distribution with a mean of \$100, and with a standard deviation of \$25. If 16 ovens are sent for repairs, find the probability that the average cost of repairs will be within \$10 of the mean.
Wednesday, December 16, 2015 by Tom Biggs

Statistics
90% of population is unemployed. Assume 10 employable people are to be selected randomly. what is the expected number of those unemployed.
Wednesday, December 16, 2015 by Benjamin

Statistics
ln a box of 200 computer chips 30 of them are defective. lf 3 chips are chosen at random with replacement, what is the probability that at least one of them is defective?
Tuesday, December 15, 2015 by Kevin

Probability & Statistics
A card is drawn from a standard deck of 52 cards. What is the probability this card will be a king or an ace?
Tuesday, December 15, 2015 by Lester

English (Cover Letter)
I suppose that I need to place a comma after "statistics", since the first phrase seems like it is a dependent clause. Am I right? "Through my Bachelor’s degrees in Biology and Statistics from XYZ University I developed a desire to work in a research ...
Tuesday, December 15, 2015 by Rema

statistics
hi, I have a 7 questions that should be answered in a Microsoft word shown work not final answer
Tuesday, December 15, 2015 by Abdullah

Statistics
Scores on the SAT form a normal distribution with u=500 and o=100. a. You are trying to qualify for a scholarship and find out that you need to have a higher score than at least 75% of the students. What score will you need? b. What is the minimum score necessary to be in the ...
Monday, December 14, 2015 by Amaya

A shipment of 50 parts contains 11 defective parts. Suppose 3 parts are selected at random, without replacement, from the shipment. What is the probability that exactly 2 parts are not defective?
Monday, December 14, 2015 by Izabella

Math (Statistics)
jean has an IQ that corresponds to 81% percentile rank. if there are 21 girls in the group, how many of them have an higher IQ than Jean? thanks...:)
Monday, December 14, 2015 by Chen

statistics
A shipment of 50 parts contains 12 defective parts. Suppose 3 parts are selected at random, without replacement, from the shipment. What is the probability that all 3 parts are defective?
Sunday, December 13, 2015 by blah

A set of data is NOT NORMALLY DISTRIBUTED. The mean is 300, and the standard deviation is 10. According to Chebyshev's Theorem, atleast what percent of the data would lie between 270 and 330? The farthest I got was 1- 1/10squared x 100% = .99, I am not sure if this is ...
Saturday, December 12, 2015 by .

statistics
Directional and nondirectional hypotheses can be easily interchanged according to the hypothesis the researcher is testing. For instance, a drug company might predict that a drug will help a subject lose weight while another drug company might predict that a drug will alter a ...
Friday, December 11, 2015 by tanisha

Behavioral Statistics Help!
Suppose we had conducted an ANOVA, with individuals grouped by political affiliation (Republican, Democrat, and Other), and we were interested in how satisfied they were with the current administration. Satisfaction was measured on a scale of 1-10, so it was measured on a ...
Thursday, December 10, 2015 by slomomo

Statistics
A US travel data center survey of 1500 adults found that 42% of the respondents stated that they favor historical sites as vacations find the 95% confidence interval of the troop portion of all adults who favor historical sites as vacation
Thursday, December 10, 2015 by Emily

statistics
The average cost per night of a hotel room in New York City is \$272 (SmartMoney, March 2009). Assume this estimate is based on a sample of 45 hotels and that the sample standard deviation is \$65.
Wednesday, December 9, 2015 by craig

statistics
the probability that a key component of a stand -by generator will fail during a power outage is q. A generator works if at least half of its key component work.Assuming that the the generator has four key components. find the probability that the generator will work
Wednesday, December 9, 2015 by TODOKO

math3, probability and statistics
plss solve and explain, x= 5, X2-X3=5, X4=7, X5=10
Wednesday, December 9, 2015 by mier

statistics
Given a sample size of 36, with sample mean 400 and sample standard deviation 85, we perform the following hypothesis test, at the 95% level of confidence: Ho: ƒÊ = 450, Ha: ƒÊ ‚ 450. What is the question and what is the answer?
Tuesday, December 8, 2015 by Anonymous

Statistics
Chi-square tests are nonparametric tests that examine nominal categories as opposed to numerical values. Consider a situation in which you may want to transform numerical scores into categories. Provide a specific example of a situation in which categories are more informative...
Tuesday, December 8, 2015 by Slomo

statistics help
Tests on a Chevy Cobalt incdicate a population mean of 32 mpg and a population standard deviation of 3.5 mpg. You take an SRS (sample random sample) of 10 cars to get a sample mean. What is the probability that your sample mean is greater than 34 mpg? I am not sure how to go ...
Tuesday, December 8, 2015 by S

Statistics
c) There is a correlation between students’ levels of anxiety and the number of days they are absent from school (r = 0.53, p = 0.31). Interpret if this result was statistically significant and explain why or why not. My answer is this: The analysis gives us a correlation...
Monday, December 7, 2015 by Stacy

statistics
how many different bidge cad can be selected fom an odinay deck of 52 cads
Monday, December 7, 2015 by rabia

Critical thinking
I have finished my assignment I just need someone to read it over and check my logic, please and thank you! 1. Read the following argument and answer the question that follows: 1. According to the 2010/11 Statistics Canada census aboriginal Canadians constituted 4.3% of the ...
Sunday, December 6, 2015 by Dan

Statistics
A machine fills 12 ounce bottles with soda. For the machine to function properly, the standard deviation of the sample must be less than or equal to 0.02 ounce. A sample of 8 bottles is selected, and the number of ounces of soda in each bottle is given. At alpha +0.05, can you...
Sunday, December 6, 2015 by Sally

statistics help
The National Association of Realtors estimates that 23% of all homes purchased in 2004 were considered investment properties. If a sample of 800 homes sold in 2004 is obtained what is the probability that AT LEAST 175 home are going to be used as investment property?
Sunday, December 6, 2015 by S

statistics help??
Someone flips a coin 50 times and gets 50 heads in a row. You suspect it is a 2 headed coin. Write the null and alternative hypotheses. Use the binomial theorem to get a p-value of getting exactly 50 hears in 50 trials.
Sunday, December 6, 2015 by S

Philosophy
Read the following argument and answer the question that follows: 1. According to the 2010/11 Statistics Canada census aboriginal Canadians constituted 4.3% of the Canadian population. 2. According to the 2011 Statistics Canada data, 27% of the adult population incarcerated in...
Sunday, December 6, 2015 by A

statistics
A manufacturer claims that the mean lifetime of its lithium batteries is 1400 hours. A homeowner selects 25 of these batteries and finds the mean lifetime to be 1380 hours with a standard deviation of 80 hours. Test the manufacturers claim. Use alpha = 0.05. Round the test ...
Saturday, December 5, 2015 by S

statistics
A university dean is interested in determining the proportion of students who receive some sort of financial aid. Rather than examine the records for all students, the dean randomly selects 200 students and finds that 118 of them are receiving financial aid. Use a 95% ...
Saturday, December 5, 2015 by S

Statistics
I have gotten the concept of probability but the following question has really stumped me. Help please. The probability that a tomato seed will germinate is 0.9. Estimate the probability that of 100 randomly selected seeds, at least 86, but no more than 91 of them will ...
Saturday, December 5, 2015 by Jose

Physics, Statistics
Consider a series of 8 flips of a fair coin. (a) Calculate the probabilities for obtaining 0-8 heads. We will consider each of these nine outcomes to be macrostates of the system. (b) Calculate the entropy for each of these macrostates. I was able to figure out part A, but I&#...
Friday, December 4, 2015 by Heidi

STATISTICS
Before accepting a large shipment of bolts, the director of an elevator construction project checks the tensile strength of a simple random sample consisting of 20 bolts. She is concerned that the bolts may be counterfeits, which bear the proper markings for this grade of bolt...
Friday, December 4, 2015 by Mary

STATISTICS
t has been claimed that 65% of homeowners would prefer to heat with electricity instead of gas. A study finds that 60% of 2000 homeowners prefer electric heating to gas. Can we conclude that the percentage who prefer electric heating differs from 65%? Use alpha = 10%
Friday, December 4, 2015 by Mary

statistics
A person rolls a standard six-sided die 7 times. In how many ways can he get 2 fives, 4 sixes, and 1 two?
Friday, December 4, 2015 by Anonymous

statistics
a student gets the following grades in his 5 subjects: 87 for calculu; 82 for Physics; 79 for Chemistry; 81 for english; 83 for history. Compute the weighted mean if the weights for the 5 subjects are 5,4,4,3, and 3, repectively
Friday, December 4, 2015 by wew

statistics
true or false if there were 15 difference scores in a matched pairs design then there were 28 participants in the study
Thursday, December 3, 2015 by tammie

statistics and probability
Find x and y so that the ordered data set as a mean of 42and a median of 35. 17,22,26,29,34,x,42,67,70,56,y soln: 17+22+26+29+34+x+42+67+70+56+y= 363+x+y (363+x+y)/11=42 y=99/x x is median
Thursday, December 3, 2015 by masinde

statistics and probability
scores on a nationwide professional qualifying exam, have a mean of 600 and a standard deviation of 50.A random sample of 100 examinees was selected.The sample mean was 360.what was the standardized value or z-score of the sample mean in this instance. soln: Z=VALUE-MEAN/...
Thursday, December 3, 2015 by masinde

statistics and probability
Jeremy sells a magazine which is produced in order to raise money for homeless people.The probability of making a sell is independently 0.09 fr each person he approaches.Given that he approaches 40 people,find the probability that he will make; (a) Two or few sells solution. B...
Thursday, December 3, 2015 by masinde

statistics and probability
A shipment of 20 computers contains 4 defective machines.Two computers are selected at random without replacement and tested for being detective. (a). is this a binomial experiment? why or why not solution. Yes. because each trial can result in just two possible outcomes. (b...
Thursday, December 3, 2015 by masinde

statistics and probability
When a die is rolled and a coin(with heads and tails) is tossed,find the probability of obtaining, (a). Tails and an even number. solution. A={HH,TT,HT,HT} B={HH,TH} (b). A number greater than 3 SOLUTION. let event C=(AuB) P(C)=P(AuB)=P(A)+P(B)-P(AnB) =3/4
Thursday, December 3, 2015 by masinde

statistics
A researcher is interested in determining whether acupuncture affects pain tolerance. An experiment is performed in which 15 students are randomly chosen from a large pool of university undergraduate volunteers. Each subject serves in two conditions. In both conditions, each ...
Wednesday, December 2, 2015 by Help me out

help fast fast
for which of the following purpose can a database be used? A.to store ionformation B.to keep track of items in a warehouse C.to track the statistics of athlets and sport tems D.all of the above
Wednesday, December 2, 2015 by shynice

Statistics, Math
For 30 randomly selected Rolling Stones concerts, the mean gross earnings is 2.37 million dollars. Assuming a population standard deviation gross earnings of 0.52 million dollars, obtain a 99% confidence interval for the mean gross earnings of all Rolling Stones concerts (in ...
Tuesday, December 1, 2015 by Lala

Math - Statistics
A six-sided die is rolled 36 times. What is the probability that an odd number is rolled at most 15 times? What is the probability that an odd number is rolled exactly 15 times? Use the Normal Approximation to a Binomial.
Monday, November 30, 2015 by Nick

Statistic
We thought if we each post a question you would answer our question. This is not a game we need help for our statistics math course before Monday day
Saturday, November 28, 2015 by Jenn

Statistic
professor has found that the grades on a Statistics Exam are normally distributed with mean 72 and a standard deviation of 12. If only the best 15 % of the grades in the class will get an A, what grade must a student get in order to get an A?
Saturday, November 28, 2015 by George

statistics (math)
of college students 45% are women 8% have a GED. suppose a student is selected at random. Given that the selected employees is a woman. what is the probability that she has a GED
Saturday, November 28, 2015 by tanya

English
Okayy Im really stuck on this one, Im usually good at analyzing and figuring out what a poem means. But not this one... QUESTION: What does the author achieve by mixing exact and approximate numbers in "A Contribution to Statistics?" A CONTRIBUTION TO STATISTICS Out ...
Saturday, November 28, 2015 by mstv

statistics
Large group of students took a test in English and the final grades have a mean of 75 and a standard deviation of 8. If we can approximate the distribution of these grades by a normal distribution. What percentage of the students (ii) Should pass the test (grades >= 60) (...
Thursday, November 26, 2015 by ali

Large group of students took a test in English and the final grades have a mean of 75 and a standard deviation of 8. If we can approximate the distribution of these grades by a normal distribution. What percentage of the students (ii) Should pass the test (grades >= 60) (...
Thursday, November 26, 2015 by ali

Statistics need help
Need help please on these questions: 1. A poll at Steve's high school was taken to see if students are in favor of spending class money to expand the junior-senior parking lot. Steve surveyed 6 random students from the population. 85% favored the expansion, while 15% ...
Wednesday, November 25, 2015 by Josh

Statistics
One last one. A poll at Steve's high school was taken to see if students are in favor of spending class money to expand the junior-senior parking lot. Steve surveyed 6 random students from the population. 85% favored the expansion, while 15% opposed it. a) Determine the ...
Wednesday, November 25, 2015 by Josh

Statistics
3. For the following data set, the dependent variable {response) is the first variable. Choose the independent variables {predictors) as you judge appropriate. Use a spreadsheet or a statistical package (e.g., SPSS or SYSTAT or MIN1TAB) to perform the necessary regression ...
Wednesday, November 25, 2015 by Shikha