Question

find arithmetic mean 3 6 9 12 15 18 21 24

Answer 1

= 3+6+9+12+15+18+21+24/8

=108/8

=13.5

hope it will help you

Answer 2

The arithmetic mean of 3 , 6 , 9 , 12 , 15 , 18 , 21 , 24 is 13.5

Given :

The observations 3 , 6 , 9 , 12 , 15 , 18 , 21 , 24

To find :

The arithmetic mean of 3 , 6 , 9 , 12 , 15 , 18 , 21 , 24

Solution :

Step 1 of 2 :

Calculate sum of the observations

Here the given observations are 3 , 6 , 9 , 12 , 15 , 18 , 21 , 24

Number of observations = 8

Sum of the observations

= 3 + 6 + 9 + 12 + 15 + 18 + 21 + 24

= 108

Step 2 of 2 :

Find the arithmetic mean

The required arithmetic mean

$\displaystyle \sf{ = \frac{Sum \: of \: the \: observations}{Number \: of \: observations} }$

$\displaystyle \sf{ = \frac{108}{8} }$

$\displaystyle \sf{ = 13.5}$

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