Mean: 8.5
Find the average:
17+2+16 +3+13+5+7+8+9+11+5+2+1+20=119
119/14=8.5
Median: 7.5
Find the middle number:
17, 2, 16, 3, 13, 5, 7, 8, 9, 11, 5, 2, 1, 20
Put them in order (smallest to biggest):
1, 2, 2, 3, 5, 5, 7, 8, 9, 11, 13, 16, 17, 20
Find middle number(s):
7, 8.. In this situation sense there are two middle numbers, find the average of the two:
7+8=15, 15/2=7.5
Mode: 2,5
Find the most common occurring number (there can be more than one):
2 and 5 appear the most
Hope this helps!!
