Mean, Median, Mode and Range

Mean, Median, Mode, and Range

1) Mean- is the "average” The mean is the usual average, so:

(13 + 18 + 13 + 14 + 13 + 16 + 14 + 21 + 13) ÷ 9 = 15

2) Median- is the "middle" value in the list of numbers.

(13 + 18 + 13 + 14 + 13 + 16 + 14 + 21 + 13)

13 14 16 18 21

3) Mode-The mode is the number that is repeated more often than any other, so 13 is the mode.

(13 + 18 + 13 + 14 + 13 + 16 + 14 + 21 + 13)

4) Range- the "range" is just the difference between the largest and smallest values.

The largest value in the list is 21, and the smallest is 13, so the range is 21 – 13 = 8.

(13 + 18 + 13 + 14 + 13 + 16 + 14 + 21 + 13)

Stem and Leaf