E The accompanying data table lists measured voltage amount

E - 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 voltageamounts, test the claim that the mean is 120 volts. Use a 0.05 significance level.

Calculate the test statistic

P Value

Find the critical value(s).

Solution

This problem involves a one-sample t-test.

H0: = 120
Ha: 120

t = 89.29017
P-value = 2*P( |t| > 89.29017 ) = 1.0179E-46

Since the P-value is less than the established significance level of 0.01, you would reject the null hypothesis.