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For a set of measurements, the mean valueis the sum of all the measurement values divided by the number of measurements in the set.
A number and a unit
Add all of the measurements together and then divide that sum by the number of measurements to get the mean. Example: (2,2,3,5,7,9). 2+2+3+5+7+9= 28. Then 28 divided by 6 (the number of terms) = 4.666 or 4 2/3
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