Question: The MacBurger restaurant chain claims that the waiting time of customers for service is normally distributed, with a mean of 3 minutes and a standard deviation of 1 minute. The quality control department found in a sample of 50 customers at the Warren Road MacBurger that the mean waiting time was 2.75 minutes. Can we conclude that the mean waiting time is less than 3 minutes?
Use = .05.
a. State the null hypothesis and the alternative hypothesis.
b. State the decision rule.
c. Compute the value of the test statistic.
d. What is your decision regarding H0?
e. What is the p-value? Interpret it.