Paul:

VTools uses following to calculate whiskers:

* Upper Whisker: = Min (Max(data), 75% + (1.5 * IQR))
* Lower Whisker: = Max (Min(data), 25% - (1.5 * IQR))

IQR := InterQuartile Range (75% - 25%)

i.e. anything higher than 75th percentile + 1.5 IQR is an outlier.

For a well behaved data set, there should be no outliers!

Hi Vandan - hope you are off to a great new year 2007!

Following up on some help you offered me in December, am I correct in saying that values below the minimum whisker would be: the 25th percetile - 1.5 IQR? I am trying to document how outliers above and below the max and min are calculated.

Thank you!
Paul



VTools uses following to calculate whiskers:

* Upper Whisker: = Min (Max(data), 75% + (1.5 * IQR))
* Lower Whisker: = Max (Min(data), 25% - (1.5 * IQR))

IQR := InterQuartile Range (75% - 25%)

i.e. anything higher than 75th percentile + 1.5 IQR is an outlier.

For a well behaved data set, there should be no outliers!

That is correct.

Thank you, Vandan!
Paul

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