A problem with a telephone line the 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 proble
minutes) from the customers’ lines.
a. At the 0.05 level of significance, is ther 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 te
d. Based on the results of (a) and (b), which t test should you use to compare the mean time to clear problems i two central offices?
(This question I may be able to answer based on me having the specific textbook it
Time Location
1.48
1.75
0.78
2.85
0.52
1.60
4.15
3.97
1.48
3.10
1.02
0.53
0.93
1.60
0.80
1.05
6.32
3.93
5.45
0.97
7.55
3.75
0.10
1.10
0.60
0.52
3.30
2.10
0.58 1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2 4.02
3.75
0.65
1.92
0.60
1.53
4.23
0.08
1.48
1.65
0.72 2
2
2
2
2
2
2
2
2
2
2 hone" contains samples of 20
the time to clear these problems (in of the time to clear problems r to justify your use of the F test? mean time to clear problems in the
aving the specific textbook it is referring to)
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