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Unformatted text preview: MATH 1131 3.0 - Fall 2011 Assignment 4 (Due Date: Nov 23, 2011) (hand in all questions) Question 1: Canadians are extremely mobile, moving due to a change in job, wanting a different climate, or wanting to be closer to (or farther from) family. In a random sample of 575 Canadians, 76 indicated that they had moved within the past year. a. Find a 90% confidence interval for the true proportion of Canadians who moved within the past year. b. Suppose no prior estimate of p is known. How large a sample is necessary in order for the bound on the error of estimation to be 0.02 with confidence level 90%. Question 2: A group of Harvard University School of Public Health researchers studied the impact of cooking on the size of indoor air particles. The decay rate for fine particles produced from oven cooking or toasting was recorded on six randomly selected days. These six measurements are 0.95, 0.83, 1.20, 0.89, 1.45, 1.12 It is assumed that the decay rate of fine particles produced from oven cooking or toasting is...
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