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Basic Math Examples
,
Step 1
Multiply by .
Step 2
Step 2.1
Factor out of .
Step 2.2
Factor out of .
Step 2.3
Cancel the common factor.
Step 2.4
Rewrite the expression.
Step 3
Combine and .
Step 4
Multiply by .
Step 5
Step 5.1
Factor out of .
Step 5.2
Cancel the common factors.
Step 5.2.1
Factor out of .
Step 5.2.2
Cancel the common factor.
Step 5.2.3
Rewrite the expression.
Step 6
The mean of a set of numbers is the sum divided by the number of terms.
Step 7
Step 7.1
Factor out of .
Step 7.2
Factor out of .
Step 7.3
Factor out of .
Step 7.4
Cancel the common factors.
Step 7.4.1
Factor out of .
Step 7.4.2
Cancel the common factor.
Step 7.4.3
Rewrite the expression.
Step 7.4.4
Divide by .
Step 8
To write as a fraction with a common denominator, multiply by .
Step 9
Combine and .
Step 10
Combine the numerators over the common denominator.
Step 11
Step 11.1
Multiply by .
Step 11.2
Add and .
Step 12
Divide.
Step 13
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.