STATISTICS AND METHODOLOGY QUESTION NO 47

32A machine on the average produces 5% defective articles. What are the mean and standard deviation in sets of 100 articles?

Option : C
Explanation : Mean = np = 100 x 0.05 = 5 σ = √(npq) = √(0.05 x 0.95 x 100) = 2.2 Hence the answer is (c).

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