review 3 (ch10 to ch12)

# review 3 (ch10 to ch12) - MTHSC 309 Review sheet for Test 3...

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MTHSC 309 Review sheet for Test 3 1. The EPA estimated that the 1991 G-car obtains a mean of 35 miles per gallon on the highway, and the company that manufactures the car claims that it exceeds the EPA estimate in highway driving. To support its assertion, the company randomly selects 36 G-cars and records the mileage obtained for each car over a driving course similar to that used by the EPA. The following data resulted: x-bar = 36.8 miles per gallon, s = 6.0 miles per gallon. Conduct a hypothesis test to see if the company’s claim is correct. Use α = .05. 2. 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 38 minutes. The owner has randomly selected 15 customers and has delivered pizzas to their homes. Suppose the p-value for the test was found to be . 0342. State the correct conclusion: a. At α = .05, we fail to reject H 0 b. At α = .02, we reject H 0 c. At α = .03, we accept H 0 d. At α = .025, we fail to reject H 0 3. According to advertisements, a strain of soybeans planted on soil prepared with a specified fertilizer treatment has a mean yield of 500 bushels per acre. A hundred farmers who belong to a cooperative plant the soybeans. Each used a 40-acre plot and records the mean yield per acre. The sample mean and

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## This test prep was uploaded on 04/09/2008 for the course MTHSC 309 taught by Professor Cathydavis during the Spring '08 term at Clemson.

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review 3 (ch10 to ch12) - MTHSC 309 Review sheet for Test 3...

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