Influence on Regression Slope
For a dataset of 30 points, the least-squares regression line has a slope of 0.85. When the point (12, 18) is removed, the slope of the new regression line becomes 0.65. When the point (4, 9) is removed from the original dataset, the new slope is 0.83. Which of the following statements is the most accurate conclusion?
A
Both points have equal influence on the regression
B
Point (4,9) is more influential than point (12,18)
C
Neither point is influential since r² wasn’t reported
D
Point (12,18) is more influential than point (4,9)
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