Question

Find the mean of observation 15, 10, 11, 12.​

Answer 1

Step-by-step explanation:

$Mean = \frac{sum \: of \: observation}{total \: number}$

$Mean = \frac{15 + 10 + 11 + 12}{4}$

$Mean = \frac{48}{4} = \frac{24}{2}$

$Mean = 12$

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Answer 2

SOLUTION

TO DETERMINE

The mean of observation 15, 10, 11, 12.

CONCEPT TO BE IMPLEMENTED

Mean

In measure of central tendency mean is the most common measure.

For a given set of observations mean is the average value of a group of numbers.

It is obtained by adding up all the observations divide by the number of observations

EVALUATION

Here the given observations are

15, 10, 11, 12

Number of observations = 4

Sum of the observations

= 15 + 10 + 11 + 12

= 48

Hence the required mean

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

$\displaystyle \sf{ = \frac{48}{4} }$

$= 12$

FINAL ANSWER

The mean of observation 15, 10, 11, 12 = 12

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