From a random sample of 200 items produced by machine I it was found that 150 items have no fault, 30 items have one fault and rest of the items have more than one fault. Of the 220 items produced by machine II, it was found that 205 items have no fault, 10 items have one fault and rest of the items have more than one fault. Q(A) What percentage of the total items produced by machine I and II separately? Q(B) What percentage of item with one fault produced by machine II? Q(C) What percentage of items with no fault are being produced? Q(D)What percentage of items with more then one fault are being produced by machine I?

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.