Stat 512 HW1 - Cody Krietemeyer Homework#1 Stat 512...

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Cody Krietemeyer Homework #1 Stat 512 Division 1 (1:30 Class time) 1. A regression analysis relating test scores (Y) to training hours (X) produced the following fitted question: yˆ = 28 − 0.4x. (a) What is the fitted value of the response variable corresponding to x = 5?
(b) What is the residual corresponding to the data point with x = 8 and y = 28? Is the point above or below the line?
(c) If x increases 2 units, how does yˆ change?
(d) An additional test score is to be obtained for a new observation at x = 7. Would the test score for the new observation necessarily be 22? Explain.

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