A store manager claims that 60% of shoppers who enter her store make a purchase. To investigate this claim, she selects a random sample of 40 customers and finds that 40% of them make a purchase. She wants to know if the data provide convincing evidence that the true proportion of all customers entering her store who make a purchase differs from 60%. What are the values of the test statistic and P-value for this test? Find the z-table here. z = –2.58, P-value = 0.0049 z = –2.58, P-value = 0.0098 z = 2.58, P-value = 0.0049 z = 2.58, P-value = 0.0098

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