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From: lauren@vortex.UUCP (Lauren Weinstein)
Newsgroups: net.news,net.news.group
Subject: Re: polling and statistics
Message-ID: <900@vortex.UUCP>
Date: Fri, 21-Mar-86 16:17:21 EST
Article-I.D.: vortex.900
Posted: Fri Mar 21 16:17:21 1986
Date-Received: Mon, 31-Mar-86 04:08:18 EST
References: <167@minnie.UUCP>
Organization: Vortex Technology, Los Angeles
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A large portion of Nielson TV ratings that are normally involved
with the small sample of "box" families are the
"overnight" rating and share figures.  Nielson and the other
ratings firms also rely very heavily on user-maintained logs for
information.  The accuracy of these logs is frequently called
into question by various groups.  In fact, the accuracy of the boxes
is also questioned, since there is evidence that some families in the
small sample may try "stack" the statistics in various ways by leaving
the TV on when nobody is watching and similar tactics.  How much
effect they actually have with such tactics is difficult to determine.

--Lauren--