Test Hypotheses About a Population Mean with Known Using P-Values $3.9$

Short Answer

Test Hypotheses about a Population Mean with Known Using P-values
-A bank claims that the mean waiting time in line is less than $3.9$ minutes. A random sample of 60 customers has a mean of $3.8$ minutes with a standard deviation of $0.6$ minute. If $\alpha = 0.05$ , test the bank's claim using $\mathrm { P }$ -values.