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Math Help - Probabilities

  1. #1
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    Probabilities

    Suppose that f (x) = 1.5x2 for -1 < x < 1 and f (x) = 0 otherwise. Determine the following probabilities.
    (a)P(0 < X)
    (b)
    P(0.5 < X)
    (c)P(-0.5 ≤ X ≤ 0.5)
    (d)
    P(X<-2)
    (e)P(X < 0 or X>-0.5)
    (f) Determine x such that P(x < X) = 0.05.

    Can you tell me how you got them? I have a TI 89 and it has built in functions too if that makes it easier to explain.

    Also, just doing a) would probably enable me to finish the rest.

    Thanks! It's urgent!!!
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  2. #2
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    Quote Originally Posted by DHS1 View Post
    Suppose that f (x) = 1.5x2 for -1 < x < 1 and f (x) = 0 otherwise. Determine the following probabilities.
    (a)P(0 < X) [B]
    Also, just doing a) would probably enable me to finish the rest.
    Can you caculate P(0 < X) = \int\limits_{ 0}^1 {1.5x^2 dx} ?
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  3. #3
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    Quote Originally Posted by Plato View Post
    Can you caculate P(0 < X) = \int\limits_{ 0}^1 {1.5x^2 dx} ?
    Oh thanks, is that how you would do it? And yes, I can do that with my calculator quick and easy
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