To find the location of a specific percentile, software such asMinitab,Python, R, and Excel uses these steps: Arrange the observations in ascending order. Use the formula for percentile location to calculate the position where the percentile value would be located, using the desired percentile va...
The above formula returns the IQR as 1.75. As you would have noticed, these values are different from the manually calculated value of IQR as 2.0. In the background, Excel uses the PERCENTILE function to calculate QUARTILE. We have a separate post explaining these two functions, PERCENTILE and...
in the example with sas the first quartile is 3, but in excel it is calculated at 3.5, why? data t1; input value; datalines; 1 2 4 7 8 9 10 12 ; PROC MEANS data=t1 q1 ; VAR value; RUN; In excel the result of the following formula is 3.5 instead: =QUARTILE(A2:A9;1) ...