Questions_winter - Review page 1 Selected Questions Question 2(8 marks Two types of cordless weed-trimmer batteries are tested One group of 5

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Review page 1 Selected Questions: Question 2: (8 marks) Two types of cordless weed-trimmer batteries are tested. One group of 5 batteries averaged 1.4 hours, while the other group consisting of 8 batteries, averaged 1.2 hours. A) What null and alternative hypotheses would you establish to determine whether or not the battery life differs between the two types? (1 mark) B) What test statistic is appropriate if and . (Please print out the appropriate formula.) (1 mark) σ 1 2 67 = . 2 2 52 = . C) Construct the appropriate critical values, assuming α =0.05. Would you accept the null or the alternative hypothesis? (4 marks) is not specified? (2 marks) D) What p-value would you report if Question 3: (4 marks) The manager for International Computer Equipment, Inc. is interested in the variability of the power used in their notebooks. Assume that the manager has no idea of the population variance and no idea of which has more variability, but believes that the parent populations can be considered normally distributed. A)
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This note was uploaded on 01/27/2012 for the course ECON 204 taught by Professor Beryl li during the Spring '11 term at University of Victoria.

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Questions_winter - Review page 1 Selected Questions Question 2(8 marks Two types of cordless weed-trimmer batteries are tested One group of 5

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