Which of the following statements concerning the box plot and z-score methods for detecting outliers is false?
A)The z-score method uses the mean and standard deviation as a basis for detecting outliers.
B)The box plot method uses the quartiles as a basis for detecting outliers.
C)The z-score method is less affected by an extreme observation in the data set.
D)The box plot method is less affected by an extreme observation in the data set.

Question

Quizplus · Accepted Answer

The z-score method is more affected by extreme observations because it relies on the mean and standard deviation, which can be heavily influenced by outliers. In contrast, the box plot method, which uses quartiles, is less sensitive to extreme values.

Which of the Following Statements Concerning the Box Plot and Z-Score