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 ten
If 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
=================================
[email protected]
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/
