AP Statistics Quiz
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INFERENCE FOR QUANTITATIVE DATA: MEANS
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A retailer compares mean amount spent per customer for shoppers who received a coupon versus those who did not. Two independent random samples were collected (Coupon: n=60n=60; No coupon: n=58n=58). A two-sample tt test for μcoup−μnoc\mu_{\text{coup}}-\mu_{\text{noc}} was conducted with H0:μcoup=μnocH_0:\mu_{\text{coup}}=\mu_{\text{noc}} and Ha:μcoup>μnocH_a:\mu_{\text{coup}}>\mu_{\text{noc}}. The p-value was 0.0007. At α=0.05\alpha=0.05, what conclusion is appropriate?
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