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Dr. David Magers Spring of 2026
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Arithmetic mean
The sum of all the values divided by the number of measurements (n)
Geometric mean
The nth root of the product of all the values multiplied first together
Median
The middle number when all of the values are put into order from smallest to greatest
Mode
The value that occurs most commonly in a set
Midrange
the average of the highest and lowest values divided by two
Range
High value minus low value
Variance

Standard deviation
square root of the variance