Final answer:
The average does not represent the center of the data.
Step-by-step explanation:
The correct answer is d) average.
The center of the data can be represented by the mean, median, or mode. However, the average, which is a common term for the mean, is not a separate measure of center.
The mean (or average) is the sum of all the data values divided by the number of data points. The median is the middle value when the data is arranged in order. The mode is the value that occurs the most frequently.