Question

1. A researcher is investigating differences in homicide rates across eastern and western cities. She collects data and finds that the mean homicide rate in 15 large east coast cities is 90.15. The mean homicide rate for 15 large west coast cities was 97.25. What would this researcher’s null and alternative hypotheses look like?

Answer 1

We need to test if mean homicide rates are different across eastern and western cities so our hypotheses will be:

Ho:

Ha: