U�ytkownik "Fred Ettish" <[EMAIL PROTECTED]> napisa� w wiadomo�ci news:[EMAIL PROTECTED] > A recent poll by the Pew Group of 15000 Muslims world wide found 71% support > Bin Laden. Looking at my textbook the formula for a population proportion > is: > > p +/- Z * SQRT ( p(1-p)/n ) > > Ok simple enough, but my question is doesn't the population size affect the > confidence interval? How does the fact that their are 2000000000 affect the > interval? > > Thanks > >
I have another question about the proportion confidence interval: With the above formula one can calcute the symmetrical interval, which is ok as long as the proportion is not too close to 0 or 1. However, from what I've heard the "real" CI is always asymmetrical (well, maybe except for p=0,5). Does anybody know how to calculate an asymmetrical CI for a proportion? I've been looking for an answer on the web some time ago and couldn't find it. Thanks, Peter. -- Serwis Usenet w portalu Gazeta.pl -> http://www.gazeta.pl/usenet/ . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
