Solved: Consider the gasoline mileage data in Exercise
Chapter 12, Problem 67E(choose chapter or problem)
Consider the gasoline mileage data in Exercise .
(a) Find \(99 \%\) confidence intervals on the regression coefficients.
(b) Find a \(99 \%\) confidence interval on the mean of \(Y\) for the regressor values in the first row of data.
(c) Fit a new regression model to these data using cid, etw, and axle as the regressors. Find \(99 \%\) confidence intervals on the regression coefficients in this new model.
(d) Compare the lengths of the confidence intervals from part
(c) with those found in part (a). Which intervals are longer? Does this offer any insight about which model is preferable?
Equation Transcription:
Text Transcription:
99%
99%
Y
99%
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