Question

The accompanying data table lists measured voltage amounts supplied directly to a​ family's home. The power supply company states that it has a target power supply of 120 volts. Using those home voltage​ amounts, test the claim that the mean is 120 volts. Use a 0.01 significance level.

Day	Volts
1	123.9
2	123.9
3	123.9
4	124.2
5	123.4
6	123.3
7	123.3
8	123.6
9	123.5
10	123.7
11	123.5
12	123.7
13	124.2
14	123.7
15	123.9
16	124.0
17	124.2
18	124.2
19	123.8
20	123.8

Day	Volts
21	124.0
22	123.9
23	123.6
24	124.1
25	123.4
26	123.4
27	123.4
28	123.4
29	123.3
30	123.5
31	123.5
32	123.6
33	124.1
34	123.9
35	123.9
36	123.8
37	123.9
38	123.7
39	123.8
40	123.8

Calculate the test statistic.

What is the range of values for the P-value?

Identify the critical values.

State the finl conclusion that addresses the original claim. Reject or fail to reject.

Answer 1