THURSDAY, SEPTEMBER 18, 2014
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Topic Probability

Probability

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This topic contains 4 replies, has 4 voices, and was last updated by  Niraj Goyal 2 years, 2 months ago.

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  • #183845 Reply

    I have an event probability of 0.004. This is the probability that a standard line product manufactured on any given day have a chance of 0.4 % of being defective. This was calculated by using the manufacture date of 9 defective units being found. We make lot sizes of 10 or 100 units in each lot and store in inventory. The question is, what is the probability of getting a defective unit if I take one unit out of inventory (could be from lot size 10 or 100)? How we calculate this probability.

    #183862 Reply

    Do your own homework.

    #183863 Reply
    Avatar of gomezadams
    Gomezadams
    Reputation - 89
    Rank - Aluminum

    Hint: Try Binomial

    #183865 Reply
    Avatar of Prabhu V
    Prabhu V
    Participant
    Reputation - 986
    Rank - Copper

    Hi,

    According to me, confidence interval related stuff can help better in the situation.

    #183924 Reply

    Niraj Goyal

    The probability if you pick just one piece of a defective is .004 whatever the lot size. There is indifference the size of Lot you pick it from.
    If the question was is the probability of finding a reject in 10 samples of a lot or 10 samples from a lot of 100 then Binomial would be used with p=.004 and 10 tries

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