You are interested in evaluating the effectiveness of training programs on police use of excessive force. Below are data on citizen complaints from an evaluation project involving three different programs designed to address the issue of police use of excessive force. The data come from a random sample of police officers who completed one of the three programs. Conduct a statistical test to determine if there is a significant difference in the mean scores for the three groups.

Group 1 Group 2 Group 3

2 3 3

3 2 3

4 2 4

2 3 1

4 3 1

3 4 1

4 1 2

1 1 2

2 3 1

1 2 1

3 1 3

1) State the null and research hypotheses in terms of H0 and H1 2) Indicate the appropriate statistical test AND WHY 3) With the significance level set at .10, specify your critical value 4) Compute and report the obtained value 5) Declare and explain your decision (i.e., whether to reject or retain the H0; . 6) Interpret the results in terms of the difference between the groups

Supposed you are interested in examining the impact of anti-bullying intervention programs. In particular, you are interested in examining changes in the number of bullying acts youths have before and after they participate in the program. You surveyed youths from one program in Sarasota County and found the following results:

# of weekly bullying # of weekly bullying acts before participating acts after participating in program in program

9 5 11 6 10 4 8 3 10 4 9 3 7 3 9_ 3

Use the data above to answer the following questions. 1) State the null and research hypotheses 2) Indicate the appropriate statistical test 3) With the significance level set at .05, specify your critical value 4) Report the obtained value 5) Declare and explain your decision (i.e., whether to reject or retain the H0; 6) Answer the following questions: Is the anti-bullying program effective? Why or why not?

Supposed you are the Director of a DUI Court and you were asked to assess its effectiveness. You conducted an experiment where you randomly assign eligible clients to experimental and control groups. You hypothesize the program will be effective in reducing the weekly number of alcoholic beverages. Use the data below to answer the questions (NOTE the standard deviation for the experimental group is 1.07 and the standard deviation for the control group is 1.14).

Experimental Control Group Group

7 5 5 6 6 4 5 3 8 4 5 3 6 6 7_ 3

1) State the null and research hypotheses 2) Indicate the appropriate statistical test 3) With the significance level set at .10, specify your critical value 4) Report the obtained value 5) Declare your decision (i.e., whether to reject or retain the H0; 6) Explain your decision