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3.
(Arithmetic) mean: the averageAdd all the numbers up and divide by thenumber of observations you have.Ex: average of 1, 2, 6 = 3In spreadsheets: =AVERAGE(…)Don’t use if there are extremes
4.
Median: the middleSort the numbers and pick the middle oneIf there’s an even number of data points, get theaverage of the two closest to the middleEx:Median of 1, 3, 100 is 3Median of 1, 3, 4, 5 is 3.5=MEDIAN(…)Better at ignoring extremes than the average is
5.
Mode: the most frequentFind the most frequent data valueMode of 1, 3, 3, 7, 7, 7, 10 is 7Good for seeing popularity=MODE(…)
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Have fun analyzing!Slides available atquantifiedself.caSacha Chua (sacha@sachachua.com)QuantifiedAwesome.com
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