Refer to the data of Exercise 13.34. a. Fit a cubic model y = β0 + β1x
Question:
a. Fit a cubic model y = β0 + β1x + β2x2 + β3x3 + É.
b. Test for lack of fit of the model at the α = .05 level.
c. Evaluate the normality and constant variance assumptions.
In exercise
Transcribed Image Text:
y 16 12 740 26 33 98 105 65 130 90 109 10 118 123 x 1 1 13 3 3 6 6 6 99 9 12 12 12 y 99 113 105 90 109 115 134 105 129 119 133 99 195 149 160 x 15 15 15 18 18 18 21 21 21 24 24 24 30 30 30
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Related Book For
An Introduction To Statistical Methods And Data Analysis
ISBN: 9781305465527
7th Edition
Authors: R. Lyman Ott, Micheal T. Longnecker
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