A social psychologist gave a questionnaire about concern for farm workers to sev
ID: 3220821 • Letter: A
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? Addition information added that is not needed.
Scores on the Concern Measure
Participant Before After
A 15 20
B 7 10
C 14 11
D 13 15
E 8 15
F 11 8
G 11 18
A) What is the appropriate test for this data?
B) Conduct the appropriate hypothesis test. Only hand calculate if you choose a z-test and then follow the five steps of hypothesis testing and provide a drawing. Otherwise, use SPSS.
C) Give an interpretation of this data (one sentence conclusion of the hypothesis test that should be free of statistical jargon) and report the statistics in APA format.
D) Explain why the test you chose is the most appropriate.
Explanation / Answer
a.Here we use paired t test.
b. Using Minitab:
Paired T-Test and CI: Before, After
Paired T for Before - After
N Mean StDev SE Mean
Before 7 11.29 2.98 1.13
After 7 13.86 4.38 1.65
Difference 7 -2.57 4.24 1.60
95% CI for mean difference: (-6.49, 1.35)
T-Test of mean difference = 0 (vs 0): T-Value = -1.61 P-Value = 0.159
c.
Since P-value greater than0.05 so you fail to reject H0 at a = 0.05. The film does not affect concern for the lives of farm workers.
d.Ginebn data shpwing paired onservations.The paired t-confidence interval and test procedures are used to analyze the differences between paired observations.
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