Question

A problem with a telephone line that prevents a customer from receiving or making calls is upsetting to both the customer and the telephone company. Samples of 20 problems reported to two different offices of a telephone company and the time to clear these problems​ (in minutes) from the​ customers' lines are provided in the Excel sheet labeled 'Phone Lines'.

Use alpha as 0.05

What test will you use?

What is the critical value?

Reject Ho?

Is there evidence of a difference?

Office 1		Office 2
1.52		7.57
1.51		3.84
0.6		0.24
2.52		1.03
0.72		0.61
1.72		0.33
4.12		3.01
3.87		2.14
1.27		0.37
3.08		4.11
1.14		3.96
0.5		0.88
0.77		1.95
1.6		0.52
0.71		1.72
1.09		4.25
6.13		0.18
3.79		1.35
5.25		1.41
0.9		0.53
Office 1		Office 2
1.52		7.57
1.51		3.84
0.6		0.24
2.52		1.03
0.72		0.61
1.72		0.33
4.12		3.01
3.87		2.14
1.27		0.37
3.08		4.11
1.14		3.96
0.5		0.88
0.77		1.95
1.6		0.52
0.71		1.72
1.09		4.25
6.13		0.18
3.79		1.35
5.25		1.41
0.9		0.53

Answer 1