# What is the variance of {-4, 5, -7, 0, -1, 10}?

##### 1 Answer

Variance (

#### Explanation:

Population data:

Sum of population data:

Population size:

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Mean:

Deviations from Mean:

Squares of Deviations from Mean:

Sum of Squares of Deviations from Mean:

Variance:

Of course we would not normally do all these steps manually

(the above was strictly for educational purposes)

We would normally use a calculator or spreadsheet with a built in function as:

If you wanted the Sample Variance

#sigma_"sample"^2 = ("sum of squares of deviations from mean")/("population size"-1)#

and- the (Excel) spreadsheet built-in function is VAR(A2:A7)