Analysis of variance of ratings of effectiveness of anti-smoking television advertisements as a function of ad type, respondent age, sex, race/ethnicity, and smoking status
| Source | Mean square | df | F Value | p Value |
|---|---|---|---|---|
| Ad type | 37 .21 | 3 | 9.3 6 | <0 .001 |
| Sex | 22.07 | 1 | 5.55 | 0.019 |
| Age group | 6.34 | 1 | 1.59 | 0.207 |
| Race/ethnicity | 4.94 | 1 | 1.24 | 0.265 |
| Smoking status | 52.58 | 1 | 13.23 | <0.001 |
| Ad type × sex | 2.82 | 3 | 0.71 | 0.547 |
| Ad type × age group | 10.54 | 3 | 2.65 | 0.048 |
| Ad type × ethnicity | 4.18 | 3 | 1.05 | 0.369 |
| Ad type × smoking status | 6.21 | 3 | 1.56 | 0.197 |