Question: A psychologist would like to examine the relative effectiveness of three therapy techniques for treating mild phobias. A sample of N = 15 individuals who display a moderate fear of spiders is obtained. These individuals are randomly assigned (n = 5) to each of the three therapies. The dependent variable is a measure of reported fear of spiders after therapy. The data are as follows:

A. Use Hypothesis testing to determine if the data indicate that there are significant differences among the three therapies? Test at the .05 level of significance.

a. Step 1: State Hypothesis

b. Step 2: Set Criteria

c. Step 3: Compute Sample Statistic

i. Use excel to compute F value

d. Step 4: Make a decision

i. Did you reject the null/fail to reject the null

ii. State your conclusions in your own words

B. Based on the above results can you determine exactly which treatments are different?