1.Some research indicates that gender is a factor that influences recidivism among offenders. We want to know whether the number of rearrests upon release from prison is very different for male than for female homicide offenders.

This is some information from the "Homicide Database":

| N | Mean number of rearrests upon release | variance (variable rearrests upon release)|

Male Offenders | 215 | 2.67 | 15.5

Female Offenders | 105 | 1.53 | 7.2

1.1.Write NON-DIRECTIONAL research hypothesis and the corresponding null hypothesis

1.2.What test statistic should you use to test that hypothesis? Compute the test statistic BY HAND. Show all work.

1.3.Using a .01 significance level, what is the critical value needed to reject the null hypothesis?

1.4.Using a .01 significance level, INTERPRET the results you have obtained. Make sure to write the result of the test statistic and its significance using the correct formula. In your interpretation, make sure to mention:

Type of test

Means

Significance

What happens to the null hypothesis

So what? That is, what do those results tell us about what we wanted to know?