Question

Suppose that the value of r is 0.91 for the data set without the outlier. Which best predicts the value of r for the data with the added outlier?

a.−0.58
b.−0.91
c.0.58
d.0.91

Answer 1

C) 0.58

Explanation:

Answer 2

Answer: The correct answer would be 0.58.

The value of r of a set of data tells us how close the values are to the line of regression of the data. If you add in an outlier, it would make the overall r value of the points further from the line. In other words, it would go further from 1.

In this case, our initial r value was positive, so it makes sense to keep it positive. 0.58 would be the best choice.