Question: Conduct a one-sample z -test to determine whether the study group was effective in significantly improving the statistics grades for the n = 27 students.

Conduct a one-sample z-test to determine whether the study group was effective in significantly improving the statistics grades for the n= 27 students. The average midterm exam point grade for the population of students who didn't complete the study group was = 35. Use the sample standard deviation as the population standard deviation (pretend that they are equal).

Report the effect size using Cohen's d. Report the results of the hypothesis test according to APA format

(based on this dataset)

Mean = 41.167

n=27

Maximum = 70

SD = 11.9759

z - score = 2.68

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