According to the manufacturer, the normal output voltage for a particular device is 120 volts. From a sample of 40 devices, the mean was found to be 123.59 volts and the standard deviation was 0.31 volt. The test statistic was then found to be 73.242. Use the test statistic and a 0.05 significance level to test the daim that the sample is from a population with a mean equal to 120 Colts. State the initial and final conclusion. a