The Metropolitan Bus Company Claims That the Mean Waiting Time $\alpha$

question 14

Essay

The Metropolitan Bus Company claims that the mean waiting time for a bus during rush hour is less than 5
minutes. A random sample of 20 waiting times has a mean of 3.7 minutes with a standard deviation of 2.1
minutes. At α $\alpha$ = 0.01, test the bus companyʹs claim. Assume the distribution is normally distributed.