SOLUTION: A quality control inspector has drawn a sample of 12 light bulbs from a recent production lot. Suppose that 20% of the bulbs in the lot are defective. What is the standard deviatio

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Question 911589: A quality control inspector has drawn a sample of 12 light bulbs from a recent production lot. Suppose that 20% of the bulbs in the lot are defective. What is the standard deviation of the number of defective bulbs in the sample?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
p(def) = .20, n = 12, sd = sqrt%28.20%2A.80%2A12%29= 1.3856