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Statistics - Random Sample

The assembly line that produces an electronic component of a missile system has historically resulted in a 2% defective rate. A random sample of 800 components is drawn. What is the probability that the defective rate is greater than 4%?

Suppose that in the random sample the defective rate is 4%. What does that suggest about the rate on the assembly line?

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(a) Mean, m = np = 800 * 0.02 = 16, sd = sqrt [np(1 - p)] = sqrt [800 * 0.02 * 0.98] = 3.96

x = 0.04 * 800 = ...

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