The marketing manager for a car manufacturer is interested in determining the proportion of new compact-car owners who would have purchased a passenger-side inflatable air bag if it had been available for an additional cost of $400. The manager believes from previous information that the proportion is 0.35. Suppose that a survey of 300 new compact-car owners is selected and 98 indicate that they would have purchased the inflatable air bags. If you wished to conduct a test to determine whether there is evidence that the true proportion is different from 0.35, which test would you use?

Select one:

t test of a population proportion.

Z test of a population mean.

t test of a population mean.

Z test of a population proportion