A Scatter Diagram Is Given with One of the Points

question 16

Multiple Choice

A scatter diagram is given with one of the points labeled ʺA.ʺ In addition, there are two least -squares regression lines
drawn. The solid line excludes the point A. The dashed line includes the point A. Based on the graph, is the point A
influential
-What effect will an influential observation have upon the graph of the least squares regression line

• A) It will pull the graph toward the observation.
• B) It will have no effect.
• C) It will push the graph away from the observation.
• D) It will lower the value of the correlation coefficient to make further analysis meaningless.

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