Concept explainers
a.
Suggest power transformations of DC output and/or speed to straighten the
b.
Suggest the transformations which would be useful to straighten the scatterplot, based on the draftsman plot in Output B.86.
c.
Perform a residual analysis to assess the assumptions of linearity, constancy of conditional standard deviations and normality of the conditional distributions, using Outputs B.87 and B.88.
Check whether there are outliers and influential observations.
d.
Explain whether the analysis in part c reveals any violations of the assumptions for regression inferences.
e.
Write the regression equation relating DC output to speed, if
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Introductory Statistics (10th Edition)
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