Referring to Scenario 9-3,for this test to be valid,it is necessary that the power consumption for microwave ovens has a normal distribution.

Question

Quizplus · Accepted Answer

The central limit theorem states that the distribution of sample means will be approximately normal, regardless of the shape of the population distribution, if the sample size is large enough. In this case, the sample size is 30, which is large enough to invoke the central limit theorem. Therefore, the power consumption for microwave ovens can be assumed to have a normal distribution, and the test is valid.

Referring to Scenario 9-3,for This Test to Be Valid,it Is