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Homework Help: Can someone help me with a Statistic problem?

  1. Nov 3, 2005 #1
    Consider a survey of n people asking whether they plan to use Route A or Route B, with an anticipated fraction p choosing Route A.

    If p = .30, plot the 95% confidence bounds and the expected value of X as a function of n, for n = 50 to n = 800.

    I have no idea where to start or how to work it out..can someone please guide me through the problem.
  2. jcsd
  3. Nov 3, 2005 #2


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    Staff Emeritus
    Science Advisor

    There are two possible outcomes - a person chooses A or B, so a binomial distribution applies.

    What have you learned about the expectation value?
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