Test Hypotheses About a Population Mean with Unknown
-A Local $3.5$

Test Hypotheses about a Population Mean with Unknown
-A local hardware store claims that the mean waiting time in line is less than $3.5$ minutes. A random sample of 20 customers has a mean of $3.7$ minutes with a standard deviation of $0.8$ minute. If $\alpha = 0.05$ , test the store's claim using P-values.