Concept explainers
To find: the effect of removing the point on the regression line
Answer to Problem 10PT
Option (c) is the correct one.
Explanation of Solution
Given:
(a) Slope would increase; y intercept would increase.
(b) Slope would increase; y intercept would decrease.
(c) Slope would decrease; y intercept would increase.
(d) Slope would decrease; y intercept would decrease.
(e) Slope and y intercept would stay the same.
Calculation:
The point
Removing this point from the data set, would then lower the regression line to the right side, meaning that the slope will decrease.
The line will also increase to the left side and thus the y-intercept will increase.
Conclusion:
Therefore, Slope would decrease; y intercept would increase
Chapter 3 Solutions
The Practice of Statistics for AP - 4th Edition
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