Q2. Below are two research scenarios. Answer questions a-d for each scenario. 1.

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Q2. Below are two research scenarios. Answer questions a-d for each scenario.

1.      You want to test the hypothesis that dropping out of school would lower involvement in delinquent behavior. You get a sample of 30 dropouts. You measure the number of delinquent offenses they committed in the year before dropping out and the number they reported in the year after dropping out.

a.       What is the independent variable in this problem?

b.      What is the dependent variable in this problem?

c.       What type of t test (independent or dependent samples) should be used for analyzing the data Why?

d.      Would a one-tail or two tailed test be appropriate? Why?

Explanation / Answer

a) independent variable - dropping out of school

b) dependent variable - involvement in delinquent behavior

c) t test dependent samples, because the one same sample units shows the number of delinquent offenses before and after dropouts

d) one tailed test: because we assume that dropping out of school would lower involvement in delinquent behavior

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