A Researcher Administered a Scale Measuring Concern for Farm Workers

question 102

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.

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Definitions:

Weekly Income

The total amount of money earned or received as compensation over the course of a week.

Standard Deviation

A measure of the amount of variation or dispersion of a set of values; a low standard deviation indicates that the values are close to the mean, while a high standard deviation indicates greater spread.

4 × 100 Relay

The 4 × 100 relay is an athletics track event where four team members each run 100 meters, passing a baton in a race against other teams.

Independent

A term typically used in statistics to describe a condition where two events or variables have no influence on each other.