Repeat Exercise 15 using the 50 service times for McDonald’s during dinner times in Data Set 25 “Fast Food.”

Data From Exercise 15:

Listed below are drive-through service times (seconds) recorded at McDonald’s during dinner times (from Data Set 25 “Fast Food” in Appendix B). Assuming that dinner service times at Wendy’s have standard deviation s = 55.93 sec, use a 0.01 significance level to test the claim that service times at McDonald’s have the same variation as service times at Wendy’s. Should McDonald’s take any action?

Data Set 15: Presidents 

Data are from 38 presidents of the United States (first five rows shown here). Presidents who took office as the result of an assassination or resignation are not included. AGE is age in years at time of inauguration. DAYS is the number of days served as president. YEARS is the number of years lived after the first inauguration. HEIGHT is height (cm) of the president. HEIGHT OPP is the height (cm) of the major opponent for the presidency.