Perform a hypothesis test for the population mean. Assume that preliminary data analyses indicate that it is reasonable to apply the z-test. Use the critical-value approach.
-In tests of a computer component, it is found that the mean time between failures is 983 hours. A modification is made which is supposed to increase reliability by increasing the time between failures. Tests on a sample of 36 modified components produce a mean time between failures of 983 hours. Using a 1% level of significance, perform a hypothesis test to determine whether the mean time between failures for the modified components is greater than 937 hours. Assume that the population standard deviation is 52 hours.

Question

Quizplus · Accepted Answer

The Answer of Perform a hypothesis test for the population mean. Assume that preliminary data analyses indicate that it is reasonable to apply the z-test. Use the critical-value approach.
-In tests of a computer component, it is found that the mean time between failures is 983 hours. A modification is made which is supposed to increase reliability by increasing the time between failures. Tests on a sample of 36 modified components produce a mean time between failures of 983 hours. Using a 1% level of significance, perform a hypothesis test to determine whether the mean time between failures for the modified components is greater than 937 hours. Assume that the population standard deviation is 52 hours.

Perform a Hypothesis Test for the Population Mean