Refer to Exercise 13 48 Suppose we are missing the following observations y 33, 28, 10 a Fit the model y 0 1x 2x2 b Test for lack of fit, using 05 c Again examine the residuals In exercise y, Solubility by Weight x, Temperature ( C) 43, 45, 42 0 32, 33, 37 25 21, 28, 29 50 15, 14, 9 75 12, 10, 8 100 7, 6, 2 125

Question: Refer to Exercise 13.48. Suppose we are missing the following observations: y = 33, 28, 10. a. Fit the model y = 0 + 1x

Refer to Exercise 13.48. Suppose we are missing the following observations: y = 33, 28, 10.
a. Fit the model y = β0 + β1x + β2x2 + ɛ.
b. Test for lack of fit, using α = .05.
c. Again examine the residuals.
In exercise
y, Solubility by Weight x, Temperature (° C)
43, 45, 42…………………………………… 0
32, 33, 37………………………………….. 25
21, 28, 29………………………………….. 50
15, 14, 9…………………………………… 75
12, 10, 8………………………………….. 100
7, 6, 2…………………………………….. 125

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