28.Skynet measured the walking speed of random travelers in San Francisco International Airport

and Cleveland Hopkins International Airport. The standard deviation speed of the 35 travelers

who were departing was 53 feet per minute. The standard deviation speed of the 35 travelers

who were arriving was 34 feet per minute. Does the evidence suggest the standard deviation

walking speed is different between the two groups? Use the a = .05 level of significance. Please

assume walking speeds are normally distributed, and that the speed of one traveler does not

influence the speed of another traveler. Thank you.