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Significance testing

lsevel

Hi all,

I'm interested in comparing the performance of an algorithm to chance with a significance test. I understand there's a t-test operator that may allow me to do this but I'm not sure how exactly. Could anyone offer some advice?

Thanks!

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earmijo

There is an operator T-test. There is an example process that illustrates its use. Click on the operator (Evaluation/Significante) and in the help Tab you'll get a description of the operator and a link to the illustrative process.

lsevel

I'm aware of this operator but it assumes a paired t-test and requires two input vectors. Is it necessary to build a 'chance' classifier or is there another way to compare one model to chance?

rachel_lomasky

I also have this question. I'd like to do a proportion test on rows of a data grid, not model performance vectors. Is this possible?

Thanks,

Rachel

sgenzer

Hello - not sure what you mean by a “proportion test”. Maybe you’re looking for a correlation matrix?

Scott

rachel_lomasky

What is prop.test in R. Which I just ended up using as a RapidMiner operator.

sgenzer

Ah I see. Never heard of prop.test but it looks like basically chi-squared independence / goodness of fit to me. @land does your stats extension do this? Anything in the toolbox, @mschmitz?

Scott

land

Hi,

we have Chi-Square test but not no direct prop.test equivalent. But seems it is solved by integrating R?

Greetings,

Sebastian

rachel_lomasky

Yeah, I'm happy with just using the R function.