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Chapter 13: Nonlinear and Multiple Regression7.a.120110dry weight100908070600 1 2 3 4 5 6 7 8exposure timeThere is an obvious curved pattern in the scatter plot, which suggests that a simplelinear model will not provide a good fit.b. The y' ˆ s , e’s, and e*’s are given below:x y ŷ e e*0 110 126.6 -16.6 -1.552 123 113.3 9.7 .684 119 100.0 19.0 1.256 86 86.7 -.7 -.058 62 73.4 -11.4 -1.06397

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