Use this data set for all problems in this practice: 15, 12, 11, 16, 17, 12, 11, 17, 12
What is the median?
The median is the middle value of a data set when the values are arranged in ascending or descending order.
First, let's arrange the data set in ascending order: 11, 11, 12, 12, 12, 15, 16, 17, 17
Since the data set has 9 values, the median will be the value in the middle.
In this case, the fifth value is 12.
Therefore, the median of the data set is 12.