A Researcher Administered a Scale Measuring Concern for Farm Workers

Essay

A researcher administered a scale measuring concern for farm workers (high scores mean high concern)to seven students before and after they attended a film about union organization of farm workers. Results are shown below.
Scores on the Concern Measure, Before and After Film
Do these results support the hypothesis that the film affected concern for the lives of farm workers? (Use the .05 level.)
a. Use the five steps of hypothesis testing
b. Figure the effect size and find the approximate power of this study.