Interpreting Effects of Outliers Exercise 5 in this section involved cotinine levels of nonsmokers who were exposed to tobacco smoke. (See the middle column in Data Set 14

“Passive and Active Smoke” in Appendix B.)

a. Identify any outliers.

b. After adding another value of 999 to the cotinine levels of nonsmokers exposed to smoke, construct the frequency distribution as in Exercise 5.

How is the frequency distribution affected by the addition of the outlier 999? State a generalization about the effect of an outlier on a frequency distribution.