A warden is interested in the ability of two different violence reduction programs to reduce violent interactions in her prison. To test for differences, the warden randomizes two groups implementing one program to each group. The amount of violent interactions per inmate is presented below. Using α = .05, perform an independent sample t test of significance.
Program A |
Program B |
9 |
8 |
7 |
5 |
7 |
8 |
5 |
3 |
8 |
4 |
7 |
9 |
6 |
6 |
7 |
7 |
8 |
7 |
3 |
2 |
What is the null hypothesis? What is the research hypothesis (two-tailed t-test)? Calculate t. . What are the degrees of freedom? . Are the results significant, why or why not?
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