Question

Pls help!

Answer 1

Answer:

Correct option is:

C

Step-by-step explanation:

Variance is defined as the arithmetic mean of the square of deviations taken from mean

Let x1,x2,....xN be n observations.

Let m be the mean

Then, $(x1-m)^2,(x2-m)^2,...(xN-m)^2$ are the square of the deviations

we have to take its arithmetic mean

Which is given by:

$\dfrac{(x1-m)^2+(x2-m)^2+...(xN-m)^2}{N}$

Hence, Correct option is:

C

Answer 2

Answer:

Which formula should be used to calculate the variance?  C

What is the variance? 58.5