Chapter 3

The median is defined as... A. The middle point in a data set. B. The geometric average of a data set. C. The arithmetic average of a data set. D. The most common value of a data set.

A

How do we find the median if the number of observations in a data set is odd? A. By averaging the first and the third quartile B. By taking the middle value in the sorted data set C. By averaging the minimum and maximum values D. By taking the middle value in the sorted data set after eliminating outliers

B

Is it possible for a data set to have no mode? A. Yes, if two observations occur twice. B. No, unless there is an odd number of observations. C. No, if the data set is nonempty, there is always a mode. D. Yes, if there are no observations that occur more than once.

D

The mode is defined as... A. The middle point in a data set. B. The geometric average of a data set. C. The arithmetic average of a data set. D. The most frequent value in a data set.

D

Which of the following is most influenced by outliers? A. Mode B. Median C. 75th Percentile D. Arithmetic mean

D