Diskusi Forum Statistika Inferential Statistic

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    HR Tiar

    Two machines used in the same operation are to be compared. A random sample of 80 parts from the first machine yields 6 nonconforming ones. A random sample of 120 parts from the second machine shows 14 nonconforming ones.

    a) Can we conclude that there is a difference in the output of the machines? Use a level of significance of 0.01.

    b) Find a 95% confidence interval for the difference in the proportion of nonconforming parts between the two machines.

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