Basic Math Examples

Find the Mean the following pulse rates were recorded for a group of 15 students. how many pulse rates were lower than the mean 85 , 80 , 84 , 83 , 63 , 70 , 87 , 73 , 85 , 73 , 76 , 80 , 68 , 82 , 66
the following pulse rates were recorded for a group of students. how many pulse rates were lower than the mean , , , , , , , , , , , , , ,
Step 1
The mean of a set of numbers is the sum divided by the number of terms.
Step 2
Simplify the numerator.
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Step 2.1
Add and .
Step 2.2
Add and .
Step 2.3
Add and .
Step 2.4
Add and .
Step 2.5
Add and .
Step 2.6
Add and .
Step 2.7
Add and .
Step 2.8
Add and .
Step 2.9
Add and .
Step 2.10
Add and .
Step 2.11
Add and .
Step 2.12
Add and .
Step 2.13
Add and .
Step 2.14
Add and .
Step 2.15
Add and .
Step 3
Cancel the common factor of and .
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Step 3.1
Factor out of .
Step 3.2
Cancel the common factors.
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Step 3.2.1
Factor out of .
Step 3.2.2
Cancel the common factor.
Step 3.2.3
Rewrite the expression.
Step 4
Divide.
Step 5
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.