Question

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? Use the 5 steps of hypothesis testing and a two-tailed test.

Answer 1

To test whether the film affected concern for the lives of farm workers, we can use hypothesis testing. Follow the steps: state the hypotheses, formulate an analysis plan, analyze the sample data, interpret the results, and state the final conclusion.

Step-by-step explanation:

To test whether the film affected concern for the lives of farm workers, we can use hypothesis testing. Here are the steps:

1. State the hypotheses: The null hypothesis, H0, is that the film did not affect concern for the lives of farm workers. The alternative hypothesis, Ha, is that the film did affect concern for the lives of farm workers.
2. Formulate an analysis plan: We will use a paired t-test to compare the mean scores before and after watching the film.
3. Analyze sample data: Calculate the paired differences between the before and after scores and then use the t-distribution to calculate the test statistic and p-value.
4. Interpret the results: If the p-value is less than 0.05, we reject the null hypothesis and conclude that the film affected concern for the lives of farm workers. If the p-value is greater than 0.05, we fail to reject the null hypothesis.
5. State the final conclusion: Based on the calculated p-value, we can state whether the results support the hypothesis that the film affected concern for the lives of farm workers.