Question

Find the mean of the observations 2,5,6,11,11,12,13,14.

Answer 1

mean = sum of all observation/no of observation

2+ 5+ 6+ 11+11+12+13+14/8

=> 74/8 = 37/4 = 9.25 Answer

Answer 2

Here is your answer :-
$mean = \frac{2 + 5 + 6 + 11 + 11 + 12 + 13 + 14}{8} \\ = \frac{74}{8} \\ = 9.25$