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An instructor asked 5 students how many hours they had studied for an exam. Here are the hours and the students grades

Hours Grade
0 52
10 95
6 83
8 71
6 64

a. make a scatter diagram of the raw scores
b. describe in words the general pattern of association
c. figure the correlation coefficient
d. explain the logic of what you have done
e. give three logically possible directions of causality
f. make raw score predictions on the criterion variable for persons with z scores on the predictor variable of -2,-2, 0, 1, 2 (Assume the hours studied is the predictor variable)
g. give the proportion of variance accounted for R squared.