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How to lie with statistics
Understand the terminology.
The word " average " gets thrown around an awful lot when statistical data are being discussed. At first glance, the term sounds straightforward enough: the average is the amount that falls roughly in the middle.
However, there are actually few different types of averages, all of which can be misleading if not properly understood. The mean average is reached by adding up all the numbers in a data set and dividing them by the number of entries in the set.