False: Median is not always one of the numbers in the data

Explanation:
The median is the middle value in a set of data when the values are arranged in ascending or descending order. If there is an odd number of data points, the median will be the middle value. However, if there is an even number of data points, the median will be the average of the two middle values. In both cases, the median may or may not be one of the actual data points.

Example:
Consider the data set {2, 4, 6, 8, 10}. The median is 6, which is one of the numbers in the data set. However, if we have the data set {1, 3, 5, 7}, the median is 4, which is not one of the numbers in the data set.

Conclusion:
Therefore, it is important to note that the median may or may not be one of the numbers in the data set, depending on the distribution of the data points and whether the number of data points is odd or even.