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Math Help - Problem involving the confidence interval

  1. #1
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    Jan 2011
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    Problem involving the confidence interval

    To buy a 30-second commercial break during the telecast of Super Bowl XXIX costs approximately $1,000,000. Not surprisingly, potential sponsors wanted to know how many people might be watching. In a survey of 1015 potential viewers, 281 said they expected to see less than a quarter of the advertisements aired during the game. Define the relevant parameter and estimate it using a 90% confidence interval.

    Not really sure where to start this one. The "relevant parameter" might be throwing me off a bit, but I feel like a push in the right direction is all I need. Any help is appreciated
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  2. #2
    Senior Member
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    Nov 2010
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    Isn't it a proportion? eg proportion of viewers watching more than a quater of advertisements.

    then the business manager can take the total audience and apply the proportion to estimate the expected number of viewers (and then cost vs revenue per viewer? something like that)
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