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A random sample of 400 electronic components manufactured by a certain process are tested, and 30...

A random sample of 400 electronic components manufactured by a certain process are tested, and 30 are found to be defective.

The company ships the components in lots of 200. Lots containing more than 20 defective components may be returned. Find a 95% confidence interval for the proportion of lots that will be returned. Use the normal approximation to compute this proportion. Round the answers to four decimal places.

The 95% confidence interval is (, ).? The first answer is 0.0009 the second one is not 0.5636

Math   Statistics-And-Probability   
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Answer #1

We are given that company ships components in lot of n=200, out of which 200 electronic components are defective and are returned.

The confidence interval formula is

there fore 95% Confidence Interval for p is (0.058, 0.142)

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