Dennis and All -- If my random digit dialing generates numbers with equal probability, and assuming both L's and UL's would answer the phones with equal likelihood, would I not get "answers" from Listed and NonListed in the same relative proportion as they are in the population? Then, if they aren't listed they would be UNlisted and have a phone.
-- Chris Chris Olsen George Washington High School 2205 Forest Drive SE Cedar Rapids, IA (319)-398-2161 > -----Original Message----- > From: dennis roberts [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, December 03, 2002 4:09 PM > To: Olsen Chris; Jill Binker; AP Statistics; > [EMAIL PROTECTED] > Subject: RE: Gallup organization on polling methods > > > At 04:56 PM 12/3/2002, Olsen Chris wrote: > >Dennis and All -- > > > >Dennis writes... > > > > > thus, they do know something about phone subscribers ... > > > that, the average > > > joe or mary does not > > > > But all the average joe or mary has to do is get a phone > book and look > > up the numbers. If they aren't there, they are unlisted. > > tell me how joe and/or mary would be able to know all the > numbers from the > phone book? and, ... even if they cut and pasted every little > itty bitty # > into excel and sort the numbers and find the "holes" ... that > tells them > WHAT are known to be listings ... not what are known to be UNlisted > numbers ... if i find with my book ... that 8142384692 is not > there ... how > do i even know 8142384692 exists? i don't > > knowing that number X is NOT in the book is not equivalent to > knowing that > X actually belongs to someone who opted and paid not to have > it in the > book, right? > > > So, except for time I still don't see that Gallup has any > different > > sampling capability than I -- I can know their > Listed/Unlisted measure > > just as well as Gallup. > > > > -- Chris > > . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
