10. Social Skills Training A social skills training program was implemented with seven special needs students in a study to determine whether the program caused improvement in pre/post measures and behavior ratings. For one such test, the pre- and posttest scores for the seven students are given in the table

a. What type of correlation, if any, do you expect to see between the pre- and posttest scores? Plot the data. Does the correlation appear to be positive or negative?

b. Calculate the correlation coefficient r. Is there a significant positive correlation?

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Subject Pretest Pretest Posttest Evan 101 113 Riley 89 89 Jamie 112 121 Charlie 105 99 Jordan 90 104 Susie 91 94 Lori 89 99