The Altair Community is migrating to a new platform to provide a better experience for you. In preparation for the migration, the Altair Community is on read-only mode from October 28 - November 6, 2024. Technical support via cases will continue to work as is. For any urgent requests from Students/Faculty members, please submit the form linked here

Variance in Statistics interface

maalvarezmaalvarez Member Posts: 4 Contributor I
edited November 2018 in Help
Hi,

I need help about the variance statistic.
I see that RapidMiner has a statistic interface called Statistics (http://rapid-i.com/api/rapidminer-5.1/com/rapidminer/example/Statistics.html).

This interface has a VARIANCE field, but I unknow the exact definition of this variance.
For example, is this field like the next formula?

image

Or is the next?

image

Thanks.

Answers

  • landland RapidMiner Certified Analyst, RapidMiner Certified Expert, Member Posts: 2,531 Unicorn
    Hi,
    actually these two formula just express the same. The first for the empirical case, where you have a finite number of samples from a distribution and the second one for the theoretical case.
    As RapidMiner just works on the samples of the example set, it uses the first one.

    Greetings,
    Sebastian
Sign In or Register to comment.