# Statistics Examples

, , , ,
The mean of a set of numbers is the sum divided by the number of terms.
Simplify the numerator.
Divide by to get .
Divide.
The mean should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.
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.

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