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Mean / Median

Definition:

In statistics, mean and median both provide an idea of where the “middle” of a sample is.

The mean (or average) is the sum of all scores divided by the number of scores. For instance the sum of individual ages of persons in a group divided by the number of persons in the group, gives the average age.

The median is the number in a range of scores that falls exactly in the middle so that 50% of the cases are above or below.

Source: GreenFacts

More:

The example below shows that mean and the median do not necessarily provide the same result:

mean

Source: GreenFacts, based on Murdoch University Why use the median and not the mean?  

To read about this term in context:

GreenFacts Summary on Diet and Nutrition Prevention of Chronic Diseases:

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