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  1. Jul 18, 2005 #1
    how do they figure out how many people have watched a certain show/event?
     
  2. jcsd
  3. Jul 18, 2005 #2

    Janus

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    They have a couple of ways.

    1. Nielson families.
    Certain families are chosen by demographic and given a device that tracks their viewing habits (In the old days they had to keep a viewing journal. ) Each family respresents a certain percentage of the viewing public.

    2. Telephone polling.
    They call a statistically significant number of people and ask them about their veiwing habits.
     
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