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Suppose we are making predictions of the dependent variable y for specific values of the independent variable x using a simple linear regression model holding the confidence level constant. Let Width (C.I) = the width of the confidence interval for the average value y for a given value of x, and Width (P.I) = the width of the prediction interval for a single value y for a given value of x.
What would be a true statement of Width (C.I)?
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What sampling technique was used for the study - What was the level of measurement for each type of data collected in the study
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