For each problem, compute the appropriate statistical test and report your conclusion. Your answer should include the following: a. Identify the appropriate statistical test. b. State the null hypothesis. c. Calculate the appropriate test statistic. Make sure to report the degrees of freedom for the statistical test (if appropriate). You must show your work to receive full credit. d. State your conclusions (use a two-tailed test with a = .05 for all tests). e. Compute an effect size. 1. Dr. Hoffman is interested in the effects of caffeine on performance. She randomly splits her statistics class of 15 students into three groups. Prior to the final exam, she has one group take no caffeine prior to taking the exam, students in another group take 100 mg of caffeine, and students in the third group take 200 mg of caffeine. She records the grades in each condition. Did caffeine significantly affect exam performance? 0 mg 100 mg 200 mg 65 75 65 57 90 72 70 85 77 60 94 56 78 86 60
For each problem, compute the appropriate statistical test and report your conclusion. Your answer should include the following:
a. Identify the appropriate statistical test.
b. State the null hypothesis.
c. Calculate the appropriate test statistic. Make sure to report the degrees of freedom for the statistical test (if appropriate). You must show your work to receive full credit.
d. State your conclusions (use a two-tailed test with a = .05 for all tests).
e. Compute an effect size.
1. Dr. Hoffman is interested in the effects of caffeine on performance. She randomly splits her statistics class of 15 students into three groups. Prior to the final exam, she has one group take no caffeine prior to taking the exam, students in another group take 100 mg of caffeine, and students in the third group take 200 mg of caffeine. She records the grades in each condition. Did caffeine significantly affect exam performance? 0 mg 100 mg 200 mg 65 75 65 57 90 72 70 85 77 60 94 56 78 86 60
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 2 images
