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Math Help - Random testing

  1. #1
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    Random testing

    A taste test with 200 randomly selected people found that only 3 of them said that they would buy a box of new Sweet Wheat Cereal. How many boxes could the manufacturer expect to sell in a country of 280 million people?
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  2. #2
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    Well, the obvious answer is (3/200) times 280 million = 4.2 million. However in real life you might want to consider factors such as whether people who say they would buy a thing will actually buy it ...
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  3. #3
    Grand Panjandrum
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    Quote Originally Posted by rgep
    Well, the obvious answer is (3/200) times 280 million = 4.2 million. However in real life you might want to consider factors such as whether people who say they would buy a thing will actually buy it ...
    Also, you might (assuming your respondents are honest) want to consider the
    sampling error inherent in 3 positive responses in a random sample of 200.

    RonL
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