Formula of mean in statistics
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A= \frac {1}{n} \sum \limits_{i=1}^n a_i
A = arithmetic mean
n = number of values
a_i = data set values
FROM THE WEB
The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.
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