Outliers Practice Questions

1. Suppose the following points were in the above data set. Which of them would best be considered an outlier? *

a. 1.7, 9.3

b. 4.3, 8

c. 8.2, 9

d. 3, 7.1

2. Deleting which of the following points weakens the correlation between beauty and evaluation scores? *

a. 6.5, 7.075

b. 3.333, 9.1

c. 3, 6.85

d. 3, 8.425

3. Adding which of the following points strengthens the correlation between beauty and evaluation scores? *

a. 7.2, 6.8

b. 3.7, 9.5

c. 5.5, 6

d. 2.1, 6.1

4. Which of the following statements is true? *

a. Adding a point near the regression line always strengthens the correlation between beauty and evaluation scores.

b. Removing a point near the regression line always weakens the correlation between beauty and evaluation scores.

c. Adding a point near the top-left corner of the graph weakens the correlation between beauty and evaluation scores.

d. Removing a point near the top-right corner of the graph strengthens the correlation between beauty and evaluation scores.