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    bourbon's Avatar
    bourbon Posts: 3, Reputation: 1
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    #1

    Oct 3, 2009, 10:17 PM
    Statistics for the sciences Q
    A random variable x has this probability distribution:

    x 0 1 2 3 4 5
    p(x) 0.1 0.3 0.4 0.1 ? 0.05


    a. Find p(4)
    b. Construct a probability histogram to describe p(x)
    c. Find µ, σ(squared), σ
    d. Locate interval µ +or- 2σ on the axis of the histogram. What is the probability that x will fall into this interval?
    e. If you were to select a very large number of values of x from the population, would most fall into the interval µ +or- 2σ ? Explain.


    I really need help, thanks in advance.
    amIwrong's Avatar
    amIwrong Posts: 157, Reputation: 16
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    #2

    Oct 3, 2009, 10:19 PM

    Cumulative Normal Distribution: Probability Calculator

    Could this help you at all? There are a variety of "statistical calculators" on line
    amIwrong's Avatar
    amIwrong Posts: 157, Reputation: 16
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    #3

    Oct 3, 2009, 10:21 PM

    A good tutoring site is HWFIRM.COM - Online Homework Help
    bourbon's Avatar
    bourbon Posts: 3, Reputation: 1
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    #4

    Oct 4, 2009, 09:18 PM

    I have to pay for that site lol... I don't have enough money for what they would want.
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