The success of an airline depends heavily on its ability to provide a pleasant customer experience. One dimension of customer service on which airlines compete is on-time arrival. The file LateFlights contains a sample of data from delayed flights showing the number of minutes each delayed flight was late for two different airlines, Delta and Southwest.

a. Formulate the hypotheses that can be used to test for a difference between the population mean minutes late for delayed flights by these two airlines.

b. What is the sample mean number of minutes late for delayed flights for each of these two airlines?

c. Using a .05 level of significance, what is the p-value and what is your conclusion?