# Statistics Examples

, , , ,

The mean of a set of numbers is the sum divided by the number of terms.

Add and to get .

Add and to get .

Add and to get .

Add and to get .

Divide.

Set up the formula for variance. The variance of a set of values is a measure of the spread of its values.

Set up the formula for variance for this set of numbers.

Simplify the numerator.

Subtract from to get .

Raise to the power of to get .

Subtract from to get .

Raise to the power of to get .

Subtract from to get .

Remove parentheses around .

Raise to the power of to get .

Subtract from to get .

Remove parentheses around .

Raise to the power of to get .

Subtract from to get .

Remove parentheses around .

Raise to the power of to get .

Add and to get .

Add and to get .

Add and to get .

Add and to get .

Simplify the denominator.

Remove parentheses.

Subtract from to get .

Divide by to get .

Approximate the result.