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Question: The director of a management training program wants to test whether there is a positive association between an applicant's score on a test prior to her or his being admitted to the program and the same person's success in the program. The director ranks 15 participants according to their performance on the pretest and separately ranks them according to their performance in the program:
Participant: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Pretest rank: 8 9 4 2 3 10 1 5 6 15 13 14 12 7 11
Performance rank: 7 5 9 6 1 8 2 10 15 14 4 3 11 12 13
Using these data, carry out the test for a positive rank correlation between pretest scores and success in the program.
suppose that there are a total of 18 students in an elementary school class. the teacher assigns each of the students a
The aim of this study participants were asked to walk briskly (time walked) daily to examine the effects on their weight at the end of the week. Data collection included the amount of hours walked daily and weight loss at the end of the week. Anal..
A simple random sample of 1600 families is chosen. What is the chance that between 9% and 11% of the sample families will not own car?
in a published study the author has presented a scatter plot of data with a line drawn through the data points. this
We are planning an experiment on the quality of video tape and have purchased 24 tapes, four tapes from each of six types. The six types of tape were 1) brand A high cost, 2) brand A low cost, 3) brand B high cost, 4) brand B low cost, 5) brand C ..
a. What is the probability that none of the accounts chosen will be delinquent? b. What is the probability that at most one of the ac counts chosen will be delinquent? c. What is the probability that there will be three cur rent, one past due..
1.a sociologist is studying the effect of having children within the first three years of marriage on the divorce rate.
According to thedata, the mean quantitative score on a standardized test for female college-bound high school seniors was 500500. The scores are approximately Normally distributed with a population standard deviation of 100100.
in an experiment die is rolled continually until a 6 appears at which point the experiment stops. what points of the
Men's health, again. Given the table of probabilities from Exercise, are high blood pressure and high cholesterol independent? Explain.
Pearson correlation of r = +0.85 indicates that a graph of the data would show ___. Clustered close to a line that slopes up to the right points clustered close to a line that slopes down.
Calculate 95 percent and 99 percent confidence intervals for m. Using the 95 percent confidence interval, can we be 95 confident that m is at least 50 pounds? Explain.
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