The following 3 questions (Q18 to Q20) are based upon the scatterplots below: If
ID: 3243745 • Letter: T
Question
The following 3 questions (Q18 to Q20) are based upon the scatterplots below: If you were to construct a regression equation using the X variable to predict the Y variable for each of the three sets of data, for which set of data would the regression equation have the most negative slope? If you were to compute a correlation between the X and Y variables for each of the three sets of data, which set of data would yield a correlation closest to zero? If you were to construct a regression equation using the X variable to predict the Y variable for each of the three sets of data, for which set of data would the regression equation have the largest, positive slope?Explanation / Answer
Q18: Most negative Slope : Plot (C)
since the collection points are in downward trend
Q19: Correlation Coefficient closed to zero: Plot (B)
since the points are vary from one point to other points
Q20: Correlation Coefficient is largest, positive slope: Plot (A)
since the points are in upward trend and are close to linear trend