Questions from Statistics

Q: You have recorded the time slept on a Tuesday and the time

You have recorded the time slept on a Tuesday and the time slept on a Sunday for a random sample of 15 students. You want to investigate whether students tend to sleep more on weekends than on weekday...

Q: You know the grade point averages (GPAs) of a random

You know the grade point averages (GPAs) of a random sample of 10 full-time college students and 10 part-time college students. You want to test the hypothesis that the typical GPAs for full-time and...

Q: Suppose a college career center was interested in the starting salaries of

Suppose a college career center was interested in the starting salaries of recent graduates in Communications Studies and Sociology. The center randomly samples 15 recent graduates from each of these...

Q: Suppose you want to determine whether meditation can cause a decrease in

Suppose you want to determine whether meditation can cause a decrease in pulse rate. You randomly select 15 students, teach them a meditation technique, and then measure their pulse rates before and a...

Q: Suppose you want to determine whether there is difference in wait times

Suppose you want to determine whether there is difference in wait times at two Department of Motor Vehicles offices. A random sample of customer wait times is obtained for each office. Which test(s) c...

Q: Tickets for high demand events are often resold on a secondary market

Tickets for high demand events are often resold on a secondary market, such as StubHub or VividSeats. Suppose a consumer is interested in determining if there is a significant difference in ticket pri...

Q: Suppose a random sample of online grocery prices (15 items)

Suppose a random sample of online grocery prices (15 items) is obtained at Amazon and Walmart. The same items were sampled at both sites, and a student wants to determine whether the typical price dif...

Q: Suppose you give a random sample of students a questionnaire about extraversion

Suppose you give a random sample of students a questionnaire about extraversion, and some (10) are classified as extraverts and some (15) as not extraverts. You want to determine whether the typical G...

Q: In a well-known study on the effects of cloud seeding

In a well-known study on the effects of cloud seeding to produce rainfall (cited on page 659 of the text by Simpson et. al), experimenters randomly assigned airplanes to release either silver nitrate...

Q: Exercise 13.35 describes a simulation exercise. Which of the

Exercise 13.35 describes a simulation exercise. Which of the following is the best explanation for the process described? a. This process allows researchers to compare the actual result to what could...