Question

What is the difference between the mean and the median of the given data?
5, 9, 8, 15, 12, 9, 2, 19, 21, 11​

Answer 1

$mean = \frac{sum \: of \: observation}{total \: number \: of \: observation}$

$\frac{5 + 9 + 8 + 15 + 12 + 9 + 2 + 19 + 21 + 11}{10}$

$\frac{111}{10} \\ =11.1$

Median = 2,5,8,9,9,11,12,15,19,21

9+11

2

$\frac{20}{2} \\ =10$