Mark T wrote: > On Fri, 09 Nov 2001 10:13:21 -0500 > Rich Ulrich <[EMAIL PROTECTED]> wrote: > > > On Thu, 8 Nov 2001 18:31:57 +0000, Mark T <[EMAIL PROTECTED]> > > wrote: > > > > > Hi, > > > > > > What are the formulae for calculating the mean to z, larger proportion and >smaller proportion of a z-score (standardised score) on a standard normal >distribution? I know about tables listing them all, but I want to know how to work it >out for myself :o) > > > > Do you want the calculus, or just a numerical approximation? > > > > For starters, in my stats-FAQ, see > > > > http://www.pitt.edu/~wpilib/statfaq/gaussfaq.html > > Thanks for your reply. Ummm, unfortunately I don't understand this :o) I am by no >means a mathematician. I am studying psychology and 1/4 of my course is statistics >*for psychology*, ie it's pretty basic without any of the advanced stuff (I hope!). >All I want to know, for interest's sake, is how one calculates the mean to z, larger >proportion and smaller proportion of a standardised score, without having to read >through a long list of numbers. Forgive me if that was covered in your FAQ, but I >couldn't see it! Perhaps you could point me in the direction of the formulae?
As pointed out in a previous post (my apologies if it was directed only to you, Mark), it sounds like what you want is the Excel formula, =NORMDIST(x, mean, stdev, cumulative) and =NORMINV(probability, mean, stdev) Draw the pictures, work until these formulas match the examples, then go for the new ones. Cheers, Jay > > > Thanks, > Mark > > ================================================================= > Instructions for joining and leaving this list and remarks about > the problem of INAPPROPRIATE MESSAGES are available at > http://jse.stat.ncsu.edu/ > ================================================================= -- Jay Warner Principal Scientist Warner Consulting, Inc. 4444 North Green Bay Road Racine, WI 53404-1216 USA Ph: (262) 634-9100 FAX: (262) 681-1133 email: [EMAIL PROTECTED] web: http://www.a2q.com The A2Q Method (tm) -- What do you want to improve today? ================================================================= Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at http://jse.stat.ncsu.edu/ =================================================================
