Question

describe the null hypothesis and alternate hypothesis and say whether the hypothesis test is two-tailed, left-tailed, or right-tailed, then conduct the test and state the proper conclusion. You must show the details of your calculations.

Specific Electric Company makes a circuit that is advertised to initiate an alarm if the power supplied to a machine reaches 100 volts. A random sample of 250 switches is tested and the mean voltage at which the alarm occurs is 98 volts with a sample standard deviation of 3 volts. Test the hypothesis that the mean voltage activation is different from the stated value at a 5% level of significance.

Answer 1