Average vs Mean

1.7.1. Mean and average
An artificial distinction is made between the notions mean and average. The mean is regarded as a
statistical function, whereas the average is found simply by adding the sample members and dividing the
result by the sample size. For example, the mean of 1, 2, miss and 3 is (1 + 2 + 3)/3 = 2, whereas the
average is (1 + 2 + miss+ 3)/4 = miss/4 = miss. If there are no missing values in the sample, the average
and mean are identical.

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