Answer:
a. 7.5
Explanation:
The median is the middle number. We can't get down to finding the median unless the data is arranged in ascending order.
Let's arrange our set from least to greatest:
15, 8, 7, 5, 4, 1, 9, 16
Rearranged → 1, 4, 5, 7, 8, 9, 15, 16
We have two middle numbers (7 and 8) so, we average them:
(7 + 8)/2 = 15/2 = 7.5