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TRIMMEAN calculates the mean taken by excluding a percentage of data points from the top and bottom ends of a data set. You can use this function when you wish to exclude outlying data from your analysis.
=TRIMMEAN(array, percent)
Array is the array or range of values to trim and average.
Percent is the fractional number of data points to exclude from the calculation. For example, if percent = 0.2, 4 points are trimmed from a data set of 20 points (20 x 0.2): 2 from the top and 2 from the bottom of the set. It does not matter what order your values are entered in. It will remove some of the highest and some of the lowest.
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How do you do trimmed mean on Microsoft Excel?
You use the TRIMMEAN function. It calculates the mean taken by leaving out a percentage of data points from the top and bottom of your set of data. You can use this function when you wish to exclude outlying data from your analysis.
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