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    hellokym Posts: 1, Reputation: 1
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    Dec 12, 2007, 02:55 PM
    Random Sample
    According to a past survey, approximately half U.S. workers said that they have enough money
    to live comfortably now and expected to do so in the future. If you select a random sample of 200
    U.S. workers,
    a. What is the probability that the sample will have between 45% and 55% who say they have
    enough money to live comfortably now and expect to do so in the future?
    b. The probability is 90% that the sample percentage will be contained within the symmetrical limits
    of the population percentage?

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