To find the mean, you will have to add all the numbers together then divide the answer by the number of values.
15+ 22+ 16+24+ 16+20+12 = 125
125 / 7 = 17.8571428571
= 18
To find the median, you have to arrange the numbers in order, smallest to largest. Then cancel out numbers on each side until you get one number.
12 , 15 , 16 , 16 , 20 , 22 , 24
16.
The number in the middle (A.K.A. The median) is 16.
Hope it helps
