Question: a random sample of 20 inmates from the county correctional center was selected and given three tests: (1) the Novaco Provocation Inventory, a test of the range and intensity of a person’s anger; (2) alcohol use- as measured on the Alcohol Scale that are taken from the Substance Abuse Subtle Screening Inventory (SASSI); and (3) drug use- as measured on the SASSI Drug Scale.

Subject Alcohol Drug Score Anger Score

1 14 12 290

2 6 10 240

3 5 8 180

4 12 10 210

5 8 7 185

6 15 12 230

7 10 8 225

8 8 10 260

9 11 8 290

10 9 10 230

11 14 12 290

12 6 10 240

13 5 8 180

14 12 10 210

15 8 7 185

16 15 12 230

17 10 8 225

18 8 10 260

19 11 8 290

20 9 10 230

a. Find the Pearson r between alcohol use and drug use. Is it significant?

b. Find the Pearson r between alcohol use and anger. Is it significant?

c. Find the Pearson r between drug use and anger. Is it significant?

d. Find the multiple R for predicting anger on the basis of both alcohol use and drug use.