Question

What is the “mean” of this number sequence?
4, 2, 2, 2, 5, 15

Answer 1

Mean = { sum of observations }÷{total number of observations }


Here,


Mean = { 4 + 2 + 2 + 2 + 5 + 15}÷{6}

Mean = 30÷6

Mean = 5




$.$

Answer 2

Hey there!

Mean is the most frequently used central tendency! It is defined to be the ratio of Sum of observations and their number.

So,
$Mean = (\overline { x } ) = \frac{Sum \: of \: observations }{Number \: of \: observations }$

Observations = 4 , 2 , 2 , 2 , 5 , 15 .

Sum of observations = 30 .

Number of observations = 6 .

$Mean = (\overline { x } ) \\ = \frac{Sum \: of \: observations }{Number \: of \: observations } \\ \\ = \frac{30}{6} \\ \\ = 5 \\ \\ (\overline { x } ) = 5$
Therefore, The mean of the observations or data is 5 .