Question: To test the effectiveness of a new studying strategy, a psychologist randomly divides a sample of 10 students into two groups, with n = 5 in each group. The students in one group receive training in the new studying strategy. Then all students are given 30 minutes to study a chapter from a history textbook before they take a quiz on the chapter. The quiz scores for the two groups are as follows:

a. Identify the appropriate statistic(s) needed to answer this question and enter the formula(s), here

See below

b. Convert these data into a form suitable for the point-biserial correlation. (Use X = 1 for training, X = 0 for no training, and the quiz score for Y)

c. Calculate the point-biserial for these data

d. Discuss your findings—is there a relationship between training strategy and the quiz scores?