Refer to the confidence interval and prediction interval formulas in Procedures 15.3 and 15.4, respectively. a. Explain
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Refer to the confidence interval and prediction interval formulas in Procedures 15.3 and 15.4, respectively.
a. Explain why, for a fixed confidence level, the margin of error for the estimate of the conditional mean of the response variable increases as the value of the predictor variable moves farther from the mean of the observed values of the predictor variable.
b. Explain why, for a fixed prediction level, the margin of error for the estimate of the predicted value of the response variable increases as the value of the predictor variable moves farther from the mean of the observed values of the predictor variable.
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