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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?
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