open excel
use 3 seperate functions in 3 cells
1) =AVERAGE(A1:A20)
2) =MEDIAN(A1:A20)
3) = MODE(A1:A20)
randomly fill in numbers in cells A1:A20 until you get something you like
1, 1, 1, 13, 16, 16, 16, 16, 16, 16, 19, 20, 20, 20, 20, 21, 21, 21, 22, 24
mean and mode = 16
median = 17.5