The Waiting Time for Patients at a Local Walk-In Health

Essay

The waiting time for patients at a local walk-in health clinic follows a normal distribution with a mean of 15 minutes and a population standard deviation of 5 minutes. The clinic wants to know if the waiting time is less than 15 minutes. The quality-assurance department sampled 50 patients and found that the mean waiting time was 14.25 minutes. For a significance level of 0.05, what is the critical value?