Jean-Marc, p is the probability of rejecting the null hypothesis when it is, in fact, false (committing a Type I error). If the null *is* false, you cannot make a Type I error and p is irrelevant.
Hope that helps, Larry -----Original Message----- From: Jean-Marc Perreault [mailto:jmarc55@;yahoo.com] Sent: Tuesday, November 12, 2002 5:56 PM To: Teaching in the Psychological Sciences Subject: RE: p is continuous, not dichotomous Mike, could you expand on how it is that a p-value is only meaningful if the Null is true? I understand the second part of your statement (Replication only useful is Null is rejected)... but would like more info on the first... cheers! Jean-Marc --- Mike Scoles <[EMAIL PROTECTED]> wrote: > A p-value is only meaningful if the null hypothesis is true. Replication is only meaningful if the null is false. > > > -----Original Message----- > > From: Martin J. Bourgeois [mailto:MartyB@;uwyo.edu] > > Sent: Tuesday, November 12, 2002 1:30 PM > > To: Teaching in the Psychological Sciences > > Subject: RE: p is continuous, not dichotomous > > > > > > Maybe I should quit before I get too far behind, > but what I'm trying to > > say (and apparently failing) is that an observed > difference between > > means is more likely to be replicated when the p > is .001 than when the p > > is .1. You can certainly calculate the probability > of replicating a > > result with a given p value, and results with > smaller p's are more > > likely to be replicated (yes, it has been > supported by data). I'll dig > > up a reference when a get a chance. > > > --- > You are currently subscribed to tips as: > [EMAIL PROTECTED] > To unsubscribe send a blank email to > [EMAIL PROTECTED] > > ===== Jean-Marc Perreault Arts & Sciences Yukon College Whitehorse, Yukon 867-668-8867 ______________________________________________________________________ Post your free ad now! http://personals.yahoo.ca --- You are currently subscribed to tips as: [EMAIL PROTECTED] To unsubscribe send a blank email to [EMAIL PROTECTED] --- You are currently subscribed to tips as: [EMAIL PROTECTED] To unsubscribe send a blank email to [EMAIL PROTECTED]
