Question

Find the mean of the following set of numbers:  

 6, 9, 11, 12 and 7

Answer 1

`barx = (x_1 + x_2 + ...... + x_n)/n` 

Here, n = 5, 

∴ `barx = (6 + 9 + 11 + 12 + 7)/5`

= `45/5`

= 9