Final answer:
The measure of central tendency that is not included in the options listed is the median. The mode, mean, and range are all measures of central tendency used to describe different characteristics of a data set.
Step-by-step explanation:
The measure of central tendency that is not included in the options listed is the median. The range, mode, and mean are all measures of central tendency, but the median is not.
The mode is the value that appears most frequently in a data set, the mean is the average of all the values, and the range is the difference between the highest and lowest value in the data set. The median, however, is the middle value of a data set when it is arranged in numerical order. It is not considered a measure of central tendency because it does not provide information about the overall average or most common value.
For example, if the data set is {1, 2, 2, 3, 4, 4, 4, 5, 6}, the median is 4 because it is the middle value. In this case, the mode would be 4 as well because it is the most frequent value, the mean would be 3.67 because it is the average of all the values, and the range would be 5 because the highest value is 6 and the lowest is 1.