Questions from Statistics

Q: When you have your blood pressure taken, the larger number is

When you have your blood pressure taken, the larger number is the systolic blood pressure. Using data from NHANES, we looked at whether men and women have different systolic blood pressure levels. a....

Q: A random sample of 40 professional baseball salaries from 1985 through 2015

A random sample of 40 professional baseball salaries from 1985 through 2015 was selected. The league of the player (American or National) was also recorded. Salary (in hundred thousand dollars) and le...

Q: A random sample of male college baseball players and a random sample

A random sample of male college baseball players and a random sample of male college soccer players were obtained independently and weighed. The following table shows the unstacked weights (in pounds)...

Q: In exercise 9.64, you could reject the null hypothesis

In exercise 9.64, you could reject the null hypothesis that the mean weights of soccer and baseball players were equal using a two-tailed test with a significance level of 0.05. a. If you found a 95%...

Q: The prices of a sample of books at University of California at

The prices of a sample of books at University of California at Santa Barbara (UCSB) were obtained by statistics students Ricky Hernandez and Elizabeth Alamillo. Then the cost of books for the same sub...

Q: The prices of a random sample of comparable (matched) textbooks

The prices of a random sample of comparable (matched) textbooks from two schools were recorded. We are comparing the prices at OC (Oxnard Community College) and CSUN (California State University at No...

Q: In a statistics class taught by one of the authors, students

In a statistics class taught by one of the authors, students took their pulses before and after being frightened. The frightening event was having the teacher scream and run from one side of the room...

Q: Follow the instructions for exercise 9.69, but use the

Follow the instructions for exercise 9.69, but use the data for the men in the class. Test the hypothesis that the mean of college men’s pulse rates is higher after a fright, using a...

Q: A student compared organic food prices at Target and Whole Foods.

A student compared organic food prices at Target and Whole Foods. The same items were priced at each store. The first three items are shown in Figure A. (Source: StatCrunch Organic food price comparis...

Q: The body temperatures of 65 men and 65 women were compared.

The body temperatures of 65 men and 65 women were compared. The results of a hypothesis test are shown. Assume the conditions for using a t-test are satisfied. (Source: Body Temperature, accessed via...