STATISTICAL TECHNIQUES AND TOOLS
REGRESSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Victoria found the least squares regression line for a set of data and then graphed a residual plot. She found that all the residuals were above 0. Which of the following is true?
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Every point must have been above the regression line.
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The slope of the regression line must be 0
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The residuals are all outliers
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This is not possible and must be the result of an error on Victoria’s part.
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Explanation:
Detailed explanation-1: -The standard error of the regression provides the absolute measure of the typical distance that the data points fall from the regression line.
Detailed explanation-2: -Based on data taken from airline fares and distances flown, it is determined that the equation of the least-squares regression line is ŷ = 102.50 + 0.65x, where ŷ is the predicted fare and x is the distance, in miles.
There is 1 question to complete.