Author Question: A researcher found that a 98% confidence interval for the mean hours per week spent studying by ... (Read 137 times)

BrownTown3 · **on:** Aug 30, 2019

Question 1

Which of the following is true about Student's t-models?
I. They are unimodal, symmetric, and bell shaped.
II. They have fatter tails than the Normal model.
III. As the degrees of freedom increase, the t-models look more and more like the Normal.
◦ I and III
◦ II and III
◦ I, II, and III
◦ I and II
◦ I only

Question 2

A researcher found that a 98% confidence interval for the mean hours per week spent studying by college students was (13, 17). Which is true?
I. There is a 98% chance that the mean hours per week spent studying by college students is between 13 and 17 hours.
II. 98% of college students study between 13 and 17 hours a week.
III. Students average between 13 and 17 hours per week studying on 98% of the weeks.
◦ I and III
◦ II only
◦ none
◦ I only
◦ III only

cadimas · **Reply #1 on:** Aug 30, 2019

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