Find the median of the following data: 5, 2, 9, 1, 7.
Correct: B
To find the median, first arrange the data in ascending (or descending) order.
Ascending order: 1, 2, 5, 7, 9.
The median is the middle value in an ordered data set. Since there are 5 values (an odd number), the median is the 3rd value, which is 5.