What does the regression line represent?
What will be an ideal response?
Ans: The regression line represents four things. First, it is the line of best fit, which minimizes that distance between the line and each of the points of the predicted variable on a scatter plot. Second, the line allows us to predict one score given the value of the independent variable. The regression line also represents the distance between each individual point and the regression line, called the error in prediction or error in estimate. Finally, the line allows us to see how far off each of the data points are from a perfect correlation. If the correlation were perfect, all the data points would be lined up along a 45? angle.
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What will be an ideal response?