Unformatted text preview: 3. Problem 1120 (p. 414) part (a). In addition, (b) Derive the variance of the slope estimate; (c) Show that the mean estimate of the slope is unbiased., i.e., E(β_hat) = β. 4. Case Study ( note that Dr. Lu will email you the data set): Consider the vehicle data published in Consumer Reports . Weight is in tons and mileage in miles per gallon. Use what you have learned in regression analysis to explore which of the following three models fit the data the best. (a) Mileage y = a linear model of weight x . (b) Mileage y = a linear model of log e ( weight x ). (c) Gallons per 100 miles = a linear model of weight x ....
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 Spring '11
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 Statistics, DR. LU

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