|QUARTILE(array,0) = PERCENTILE.INC(array,0)|
|QUARTILE(array,1) = PERCENTILE.INC(array,0.25)|
|QUARTILE(array,2) = PERCENTILE.INC(array,0.50)|
|QUARTILE(array,3) = PERCENTILE.INC(array,0.75)|
|QUARTILE(array,4) = PERCENTILE.INC(array,1)|
There is also Percentile functionality included in the Analysis ToolPak add-in.
Which Method ?
There are a number of different ways to calculate a percentile value.
Excel provides two alternatives.
We will refer to them an (N-1) and (N+1).
In the (N-1) method, the ordinal rank is calculated using the formula:
In the (N+1) method, the ordinal rank is calculated using the formula:
Once you have the ordinal rank number the percentile can be easily calculated using the following formula
Split the ordinal rank into an integer component (k) and a decimal component (d)
PERCENTILE.INC - N-1
PERCENTILE.EXC - N+1
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