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Hello, this question is from H7 Spring 2017 Solutions (Indiana University, Purdue University Indianapolis)(ECON E470), a document on your website. It provides a solution but

Hello, this question is from H7 Spring 2017 Solutions (Indiana University, Purdue University Indianapolis)(ECON E470), a document on your website. It provides a solution but I cannot figure out where they are getting their numbers. I tried asking for an explanation through the document itself but your team failed to provide one. I am honestly super disappointed in this website as this is usually the case when I ask questions on here or they are answered completely wrong. Please change my mind and don't make me unsubscribe before my subscription even ends..

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15 Perform the following test of hypothesis: Ho: 66 5 65 H1: 66 > 65 The t-Stat for the test is, 4.212 4.955 5.829 6.858 t-Stat = (d6 - ds) /se(d6 - ds) var(d6 - ds) = var(ds) + var(d6) - 2cov(ds, d6) = 0.0216 se(d6 - ds) = 0.1469 t-Stat = 6.858 P-value = 7.4E-09 Conclude that DISPAD is more effective than just DISP for increasing sales

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