Description
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Do problem 2.6. Skip part 2.6.4.
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For the data set in problem 2.6, do the following.
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Calculate a 95% confidence interval for the model intercept
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Produce an effect plot for the effect of fall on the mean of winter
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What are the values of the largest and smallest residuals?
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Interpret the residual plot shown below in terms of the appropriateness of the linear model:
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Do problem 2.13.
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For the data set in problem 2.13, do the following.
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Calculate the value of the correlation coefficient r
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If the intercept-only model is fit to the data, what is its estimated intercept ˆ ?
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β0
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Produce the ANOVA table for this model. Be sure to include a “Total” row in your table.
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If the predictor mheight is standardized before fitting the model, the resulting fitted model becomes
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Eˆ(Y ) = 63.75 + 0.54 ∗ x. Interpret the slope and intercept in this model.