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Math Help - Probability question

  1. #1
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    Probability question



    i can not figure out since i don't know it's normally distributed or not?
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  2. #2
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    You can do a test for normality but you need the raw data which in this case looks unavailable.

    What impact would the C.L.T. have in this question?

    Have you thought to use a different distribution i.e. binomial?
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  3. #3
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    Quote Originally Posted by pickslides View Post
    You can do a test for normality but you need the raw data which in this case looks unavailable.

    What impact would the C.L.T. have in this question?

    Have you thought to use a different distribution i.e. binomial?
    i did solve part b) using binomial theorem and i got the answer of 0.9713

    but in part a) i can not use binomial since np is less than 5.
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  4. #4
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    Quote Originally Posted by Jattboyz View Post
    i did solve part b) using binomial theorem and i got the answer of 0.9713

    but in part a) i can not use binomial since np is less than 5.

    "if" you are using the binomial approximation to the Normal.
    For part (a) you have the 2-day probability figure...

    (p+q)^5=\binom{5}{5}p^5+\binom{5}{4}p^4q+.....

    The probability that all 5 are returned by Monday is p^5=0.8^5
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