Question

find the mean of first seven even numbers

Answer 1

The mean of first seven even numbers = 8

Given :

The first seven even numbers

To find :

The mean of first seven even numbers

Solution :

Step 1 of 3 :

Write down the given observations

The first seven even numbers are 2, 4, 6, 8, 10, 12, 14

Step 2 of 3 :

Calculate the sum of the observations

Number of observations = 15

Sum of the observations

= 2 + 4 + 6 + 8 + 10 + 12 + 14

= 56

Step 3 of 3 :

Find the mean

The required mean

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

$\displaystyle \sf{ = \frac{56}{7} }$

$\displaystyle \sf{ = 8}$

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