Which measure of central tendency is calculated by finding the average of the two middle numbers?

The measure of central tendency that involves finding the average of the two middle numbers is the median. To determine the median, you first arrange the numbers in a data set in ascending order. If there is an odd number of values, the median is the middle number. However, if there is an even number of values, the median is calculated by taking the two middle numbers, adding them together, and then dividing by two to find their average. This process ensures that the median accurately reflects the center of the data set, providing a more reliable measure, especially in cases where there are outliers that could skew the mean. The other measures mentioned, such as mean, mode, and range, do not involve averaging the two middle numbers in a data set as part of their definitions.