1. Based on the following research questions, indicate whether you should conduct a z test, a single sample t test, an independent samples t test, or a related samples t test?

A. A researcher randomly sampled male and female youth to participate in a delinquency prevention program. She measured the youth's attitudes about antisocial behavior before and after participating in the program.

B. A researcher was interesting is studying differences in policing in poor and wealthy communities. The researcher gathered information on a sample of poor and wealthy communities and measured the number of disorderly conduct arrests in each community.

C. A researcher wanted to compare the average recidivism rate between a sample of juvenile programs and the population of juvenile programs. The researcher has the population mean but not the population standard deviation.