Solve the Problem $\mu = 18.7$ 187 Months at the 0

Essay

Solve the problem.
-A researcher wants to test the claim that convicted burglars spend an average of 18.7 months in jail. She takes a
random sample of 11 such cases from court files and finds that x = 20.6 months and s = 7.8 months. Test the
claim that $\mu = 18.7$ 18.7 months at the 0.05 significance level. Use the traditional method of testing hypotheses.