The marketing manager for an automobile manufacturer is interested in determining the proportion of new compact-car owners who would have purchased a GPS navigation system if it had been available for an additional cost of $300.The manager believes from previous information that the proportion is 0.30.Suppose that a survey of 200 new compact-car owners is selected and 79 indicate that they would have purchased the GPS navigation system.If you were to conduct a test to determine whether there is evidence that the proportion is different from 0.30 and decided not to reject the null hypothesis,what conclusion could you reach?
A)There is sufficient evidence that the proportion is 0.300.
B)There is not sufficient evidence that the proportion is 0.300.
C)There is sufficient evidence that the proportion is 0.30.
D)There is not sufficient evidence that the proportion is not 0.30.

Question

Quizplus · Accepted Answer

When you decide not to reject the null hypothesis in a hypothesis test, it means you have not found sufficient evidence to support the alternative hypothesis. Therefore, you conclude that there is not enough evidence to say the proportion is different from 0.30, but this does not prove the proportion is exactly 0.30.

The Marketing Manager for an Automobile Manufacturer Is Interested in Determining