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Unformatted text preview: - 1 - BUAD 310 In-Class Practice for Quiz 2 3/1/10 1. a) Determine the p-value for H : p = 0.5 versus H a : p > 0.5 when n = 225 and ˆ p = 0.55. b) For a test with a significance level of = 0.10, what would you decide? c) What if the alternative hypothesis had been two-sided? Now what is the p-value? d) What is your decision for the two-sided test? 2. Customers of a company were surveyed as to whether they were satisfied with the service they received. A sample of 2,000 customers yielded ˆ p = 0.60 (proportion of customers satisfied with service in the sample.) What is the standard error of the sample proportion of customers satisfied with service? 3. A recent study conducted by the state government attempts to determine whether the voting public supports further increase in cigarette taxes. If the proportion in favor is at least two-thirds (or 0.67), the government will add some legislation to the next ballot. The opinion poll recently sampled 1500 voting age citizens and 1020 of the sampled citizens were in favor of an increase in...
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This note was uploaded on 09/05/2010 for the course BUAD 310 taught by Professor Lv during the Spring '07 term at USC.
- Spring '07