Question

"10.45 A problem with a telephone line that prevents a customer from receiving or making calls is upsetting to both the customer and the telecommunications company. The file Phone contains samples of 20 problems reported to two different offices of a telecommunications company and the time to clear these problems (in minutes) from the customers’ lines.A) At the 0.05 level of significance, is there evidence of a difference in the variability of the time to clear problems between the two central offices?

B)Determine the p-value in (a) and interpret its meaning.

C)What assumption do you need to make in (a) about the two populations in order to justify your use of the F test?

D)Based on the results of (a) and (b), which t test defined in Section 10.1 should you use to compare the mean time to clear problems in the two central offices?"

Time	Location
1.48	1
1.75	1
0.78	1
2.85	1
0.52	1
1.60	1
4.15	1
3.97	1
1.48	1
3.10	1
1.02	1
0.53	1
0.93	1
1.60	1
0.80	1
1.05	1
6.32	1
3.93	1
5.45	1
0.97	1
7.55	2
3.75	2
0.10	2
1.10	2
0.60	2
0.52	2
3.30	2
2.10	2
0.58	2
4.02	2
3.75	2
0.65	2
1.92	2
0.60	2
1.53	2
4.23	2
0.08	2
1.48	2
1.65	2
0.72	2

Answer 1