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Which of the following statements about the standard deviation of the residuals is true? I. It describes the typical vertical distance between an observed data

Which of the following statements about the standard deviation of the residuals is true? I. It describes the typical vertical distance between an observed data point and the regression line. II. It does not tell you if the data is truly linear. III. It measures the overall precision of predictions made using the regression equation.

I only

II only

III only

IandIIandIII

Both I and III

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