The airport manager at the Sacramento, California, airport recently conducted a study of passengers departing from the airport. A random sample of 100 passengers was selected. The data are in the file called Airline Passengers. An earlier study showed the following usage by airline:
Delta…………………………20%
Horizon………………………10%
Northwest……………………10%
Skywest……………………….3%
Southwest……………………25%
United……………………….32%
a. If the manager wishes to determine whether the airline usage pattern has changed from that reported in the earlier study, state the appropriate null and alternative hypotheses.
b. Based on the sample data, what should be concluded? Test using a significance level of 0.01.