Jack Cohen (and others) made a distinction between a NULL hypothesis (specification of a value for some parameter) and a NIL hypothesis (the parameter, which may be a difference or may be an index of relationship, has a value of zero). I always just assumed that the two hypotheses were just numbered with with 0 and 1. ----- Original Message ----- From: "Richard M." <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, March 20, 2003 12:41 PM Subject: is the Null hypothesis always equal to zero?
I know that it is possible to reject an hypothesis that is not equal to zero (like a difference of 0.5 standard deviation or a correlation less or equal to .20). But I wonder whether we still call such an hypothesis the "NULL" hypothesis. . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . ================================================================= . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
