EFN422_Week11_Practice_Questions

EFN422_Week11_Practice_Questions - Practice Questions Week...

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Practice Questions Week 11 Question 1 : Type I and Type II errors The clean air legislation in Australia requires that vehicle exhaust emissions not exceed certain limits for various types of pollutants. In Queensland, the Department of Environment has recently received complaints that some car repair workshops certified vehicles that did not meet the emission standard. The regulator decides to check a random sample of cars that a suspect repair shop has certified as okay. They will revoke the shop’s license if they find significant evidence that the shop is issuing certificates for cars that do not meet the standard. (a) In this context, what is a type I error? (b) In this context, what is a type II error? (c) Which type of error would the shop owner consider more serious? (d) Which type of error might the environmentalists consider more serious? Question 2: Promotion Campaign The manager of Bowl-a-Rama wants to test to see if a new promotion using vouchers where a customer gets 3 games for the price of two has increased the number of customers. Prior to the
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