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Math Help - Need Help with statistics case

  1. #1
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    Need Help with statistics case

    I have attached the case description.

    I do not know how to start solving this case.

    4.1. The group would like to further study the process before instituting any changes. If a sample of 50 cus­tomers is selected on a given day, what is the probabil­ity that
    a. fewer than 3 customers would receive a free newspaper?
    b. between 2 and 4 customers (inclusive) would receive a free newspaper?
    c. more than 5 customers would receive a free news­paper?
    4.2. If the process of delivering newspapers could be improved so that only 5% of the customers did not receive delivery by 7 A.M., what would be the probability that in a sample of 50 customers
    a. fewer than 3 customers would receive a free news­paper?
    b. between 2 and 4 customers (inclusive) would receive a free newspaper?
    c. more than 5 customers would receive a free newspaper?



    Appreciate any help !!

    Thank You.
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  2. #2
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    Quote Originally Posted by bhuvan View Post
    I have attached the case description.

    I do not know how to start solving this case.

    4.1. The group would like to further study the process before instituting any changes. If a sample of 50 cus­tomers is selected on a given day, what is the probabil­ity that
    a. fewer than 3 customers would receive a free newspaper?
    b. between 2 and 4 customers (inclusive) would receive a free newspaper?
    c. more than 5 customers would receive a free news­paper?
    4.2. If the process of delivering newspapers could be improved so that only 5% of the customers did not receive delivery by 7 A.M., what would be the probability that in a sample of 50 customers
    a. fewer than 3 customers would receive a free news­paper?
    b. between 2 and 4 customers (inclusive) would receive a free newspaper?
    c. more than 5 customers would receive a free newspaper?



    Appreciate any help !!

    Thank You.
    Use the binomial distribution.

    4.1 n = 50, p = 0.07.

    4.2 n = 50, p = 0.05.
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  3. #3
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    Thank you for your Help ..
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  4. #4
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    I understand the problem but i am confuse in below.

    does "fewer" mean 3 or 2? what rationale applies to the term "inclusive" ??

    Appreciate your reply.
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  5. #5
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    Quote Originally Posted by bhuvan View Post
    I understand the problem but i am confuse in below.

    does "fewer" mean 3 or 2? what rationale applies to the term "inclusive" ??

    Appreciate your reply.
    I would have thought that fewer than 3 meant 0, 1 or 2.
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  6. #6
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    "fewer than 3 " mean less than 3 P(X < 3)?
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