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From |
Christoph Merkle <chmerkle@rumms.uni-mannheim.de> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Chi-square test with probabilities |

Date |
Tue, 11 Nov 2008 20:11:40 +0100 |

I have to clarify this a bit:

That is why I proposed a chi square goodness of fit test.

Zitat von Ronan Conroy <rconroy@rcsi.ie>:

On 11 Nov 2008, at 17:19, Christoph Merkle wrote:Actually I'm only interested if the mean of these peobabilities over participants is different from hyposized proportions. If I use a simple ttest I can only test each of the variables one by one. But I want to test the distribution over the tenIf the events are mutually exclusive and collectively exhaustive, then the probabilities ought to add up to 1, but I fear that they won't. I think you are better testing one-by-one, using a t-test to test the hypothesis that the mean guessed probability is the same as the actual value, unless you have a hypothesis that is independent of the probability being guessed (such as 'humans overestimate the chances of rare events happening') in which case, I would treat it as a repeated measures design. Ronan Conroy ================================= rconroy@rcsi.ie Royal College of Surgeons in Ireland Epidemiology Department, Beaux Lane House, Dublin 2, Ireland +353 (0)1 402 2431 +353 (0)87 799 97 95 +353 (0)1 402 2764 (Fax - remember them?) http://www.flickr.com/photos/ronanconroy/sets/72157601895416740/ P Before printing, think about the environment * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

Christoph Merkle Center for Doctoral Studies in Business GESS - University of Mannheim Schloss, Room M 114 68161 Mannheim Germany Phone: +49-621-1813774 E-mail: chmerkle@rumms.uni-mannheim.de * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**RE: st: Chi-square test with probabilities***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**References**:**st: Chi-square test with probabilities***From:*Christoph Merkle <chmerkle@rumms.uni-mannheim.de>

**Re: st: Chi-square test with probabilities***From:*Ronan Conroy <rconroy@rcsi.ie>

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