A social psychologist gave a questionnaire about concern for farm workers to seven participants ...

A social psychologist gave a questionnaire about concern for farm workers to seven participants before and after they attended a film about union organization of farm workers. The results are shown below with high scores meaning high concern. Using the .05 significance level, do these results support the hypothesis that the film affected concern for the lives of farm workers
Scores on the Concern Measure
Participant   Before      After
A      17      20
B      7      4
C      10      11
D      13      15
E      8      5
F      9      8
G      11      14

a.   Use the five steps of hypothesis testing.

b.   Figure the effect size and find the approximate power of this study.