The accompanying data table lists measured voltage amounts s

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 120volts. Use a 0.05 significance level.

What are the null and alternative hypotheses?

A. Upper H 0: Mu equals120 Upper H 1: Mu not equals120

B. Upper H 0: Mu not equals120 Upper H 1: Mu greater than120

C. Upper H 0: Mu not equals120Upper H 1: Mu equals120

D. Upper H 0: Mu equals120 Upper H 1: Mu greater than120

Calculate the test statistic.

Solution

The null and alternative hypotheses are:

A. Upper H 0: Mu equals120 Upper H 1: Mu not equals120