A psychologist would like to examine the effects of different testing methods on

Question

A psychologist would like to examine the effects of different testing methods on the final performance of college students. One group gets regular quizzes, one group gets three large exams, and the third group only gets a final exam. At the end of the course, the psychologist interviews each student to get a measure of the student’s overall knowledge of the material.

Quizzes Exams Final only

4 1 0

6 4 2

3 5 0

7 2 2

T = 20 T = 12 T=4

SS = 10 SS = 10 SS=4

G=36
X2=164 2

State the null hypothesis. (1 POINT)

Compute the necessary hypothesis test using a two-tailed test with = .05. Showyour calculations. (5 POINTS)

Make a decision about your null hypothesis. (Include the critical value you used tobase your decision.) (1 POINT)

Write an APA format statement summarizing your findings. (Include a measure of effect size if necessary.) (2 POINTS)

Explain what would need to be done next to follow up on any significant effects. (2 POINTS)

Explanation / Answer

Null hypothesis:

Test statistics:

decision rule:

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