Question

write is mean of a group of a observation find mean of the given observation of the 1,3,8,21,31,24,80​

Answer 1

Answer:

the mean = aum of observation/no. of observation

so

mean=1+3+8+21+31+24+80/7

Answer 2

Given :

• Given observations are 1, 3, 8, 21, 31, 24, 80

To Find :

• Mean of the given observations.

Calculation :

In order to calculate the mean of the the given observations, formula is given by,

$\underline{ \boxed{ \tt{Mean = \dfrac{Sum \: of \: all \: observations}{Number \: of \: observations}}}}$

• Number of all observations is 7.

Firstly, let's calculate the sum of all numbers,

$\rightarrow \bf 1 + 3 + 8 + 21 + 31 + 24 + 80$

On adding the numbers,

$\rightarrow{ \pink{\boxed{\bf 168}}}$

Therefore, sum of all observations is 168.

Putting the values,

Now let's substitute values in the equation,

Using formula -

$\underline{ \boxed{ \tt{Mean = \dfrac{Sum \: of \: all \: observations}{Number \: of \: observations}}}}$

Plugging the values,

$\longrightarrow \bf Mean = \dfrac{168}{7}$

On dividing the numbers,

$\longrightarrow{ \underline{ \boxed{\bf Mean = 24}}} \: \blue{\bigstar}$

Henceforth,

• The mean of the given observations is 24.