Question

Dr. Yan predicts that a novel antidepressant drug improves cognition. To examine this, the drug is administered to a random sample of 28 trained rats. The rats were then placed in a maze and timed on how long it took them to complete it. The average completion time was 48 seconds. Normal rats have an average completion time of 44 seconds with a variance of 100.00 seconds. What can be concluded with an α of 0.10? )

What is the appropriate test statistic? ---Select--- na z-test one-sample t-test independent-samples t-test related-samples t-test

b) Population: ---Select--- time to complete maze normal rats trained rats the maze memory Sample: ---Select--- time to complete maze normal rats trained rats the maze memory

c) Compute the appropriate test statistic(s) to make a decision about H0. (Hint: Make sure to write down the null and alternative hypotheses to help solve the problem.) critical value = ; test statistic = Decision: ---Select--- Reject H0 Fail to reject H0

d) If appropriate, compute the CI. If not appropriate, input "na" for both spaces below. [ , ]

e) Compute the corresponding effect size(s) and indicate magnitude(s). If not appropriate, input and select "na" below. d = ;   ---Select--- na trivial effect small effect medium effect large effect r2 = ;   ---Select--- na trivial effect small effect medium effect large effect

f) Make an interpretation based on the results. Rats on the anxiety drug were significantly slower completing the maze .Rats on the anxiety drug were significantly quicker completing the maze. The anxiety drug did not affect rats in completing the maze.

Answer 1