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Unformatted text preview: Test of Hypothesis One sample Test 1. A coin is tossed 1000 times and 540 heads appear. At = 0.05, test the claim that this is a biased coin. 2. Increasing numbers of businesses are offering child-care benefits for their workers. However, one union claims that more than 80% of firms in the manufacturing sector still do not offer any child-care benefits to their workers. A random sample of 500 manufacturing firms is selected, and only 30 of them offer child-care benefits. Test the union claim at = 0.05. 3. A recent study claimed that more than 15% of junior high students are overweight. In a sample of 160 students, 20 were found to be overweight. At = 0.10, test the claim. 4. A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has determined that home delivery will be successful if the average time spent on the deliveries does not exceed 36 minutes. The owner has randomly selected 21 customers and has delivered pizzas to their homes in order to test if the mean delivery time actually exceeds 36 minutes. Suppose the mean delivery time from this sample was found to be 37 minutes and standard deviation equal to 2 minutes. Test whether the mean delivery time actually exceeds 36 minutes at = 0.01....
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- Fall '08