Basic Math Examples

Find the Mean 3.0 , 2.7 , 3.5 , 2.7 , 3.0 , 2.6 , 2.9 , 3.2 , 2.6 , 2.7 , 2.6 , 2.8 , 2.7 , 2.8
33 , 2.72.7 , 3.53.5 , 2.72.7 , 33 , 2.62.6 , 2.92.9 , 3.23.2 , 2.62.6 , 2.72.7 , 2.62.6 , 2.82.8 , 2.72.7 , 2.82.8
Step 1
The mean of a set of numbers is the sum divided by the number of terms.
3+2.7+3.5+2.7+3+2.6+2.9+3.2+2.6+2.7+2.6+2.8+2.7+2.8143+2.7+3.5+2.7+3+2.6+2.9+3.2+2.6+2.7+2.6+2.8+2.7+2.814
Step 2
Simplify the numerator.
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Step 2.1
Add 33 and 2.72.7.
5.7+3.5+2.7+3+2.6+2.9+3.2+2.6+2.7+2.6+2.8+2.7+2.8145.7+3.5+2.7+3+2.6+2.9+3.2+2.6+2.7+2.6+2.8+2.7+2.814
Step 2.2
Add 5.75.7 and 3.53.5.
9.2+2.7+3+2.6+2.9+3.2+2.6+2.7+2.6+2.8+2.7+2.8149.2+2.7+3+2.6+2.9+3.2+2.6+2.7+2.6+2.8+2.7+2.814
Step 2.3
Add 9.29.2 and 2.72.7.
11.9+3+2.6+2.9+3.2+2.6+2.7+2.6+2.8+2.7+2.81411.9+3+2.6+2.9+3.2+2.6+2.7+2.6+2.8+2.7+2.814
Step 2.4
Add 11.911.9 and 33.
14.9+2.6+2.9+3.2+2.6+2.7+2.6+2.8+2.7+2.81414.9+2.6+2.9+3.2+2.6+2.7+2.6+2.8+2.7+2.814
Step 2.5
Add 14.914.9 and 2.62.6.
17.5+2.9+3.2+2.6+2.7+2.6+2.8+2.7+2.81417.5+2.9+3.2+2.6+2.7+2.6+2.8+2.7+2.814
Step 2.6
Add 17.517.5 and 2.92.9.
20.4+3.2+2.6+2.7+2.6+2.8+2.7+2.81420.4+3.2+2.6+2.7+2.6+2.8+2.7+2.814
Step 2.7
Add 20.420.4 and 3.23.2.
23.6+2.6+2.7+2.6+2.8+2.7+2.81423.6+2.6+2.7+2.6+2.8+2.7+2.814
Step 2.8
Add 23.623.6 and 2.62.6.
26.2+2.7+2.6+2.8+2.7+2.81426.2+2.7+2.6+2.8+2.7+2.814
Step 2.9
Add 26.226.2 and 2.72.7.
28.9+2.6+2.8+2.7+2.81428.9+2.6+2.8+2.7+2.814
Step 2.10
Add 28.928.9 and 2.62.6.
31.5+2.8+2.7+2.81431.5+2.8+2.7+2.814
Step 2.11
Add 31.531.5 and 2.82.8.
34.3+2.7+2.81434.3+2.7+2.814
Step 2.12
Add 34.334.3 and 2.72.7.
37+2.81437+2.814
Step 2.13
Add 3737 and 2.82.8.
39.81439.814
39.81439.814
Step 3
Divide 39.839.8 by 1414.
2.84285712.8¯¯¯¯¯¯¯¯¯¯¯¯428571
Step 4
Divide.
2.842857142.84285714
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.
2.842.84
 [x2  12  π  xdx ]  x2  12  π  xdx