# Statistics Examples

, , , ,
The mean of a set of numbers is the sum divided by the number of terms.
Simplify the numerator.
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 result.
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 .
Simplify the denominator.
Remove parentheses.
Subtract from to get .
Divide by to get .
Approximate the result.