Jacob Lee is a frequent traveler between Los Angeles and San Francisco. For the past month, we wrote down the flight times on three different airlines. The results are:
|
Goust
|
Jet red
|
Cloudtran
|
|
51
|
50
|
52
|
|
51
|
53
|
55
|
|
52
|
52
|
60
|
|
42
|
62
|
64
|
|
51
|
53
|
61
|
|
57
|
49
|
49
|
|
47
|
50
|
49
|
|
47
|
49
|
|
|
50
|
58
|
|
|
60
|
54
|
|
|
54
|
51
|
|
|
49
|
49
|
|
|
48
|
49
|
|
|
48
|
50
|
|
a. Use the .05 significance level and the five-step hypothesis-testing process to check if the there is a difference in the mean flight times.
b. Develop a 95% confidence interval for the difference in the means between Goust and Cloudtran.