The executives at Sandbachian, Inc., has recently solved their widget crisis, have another problem with one of their products. Many cities are sending complaints that their manhole covers are defective and people are falling into the sewers. The workers took a random sample of 800 manhole covers and found that 40 of them were defective. What is the 95% CI for p, the true proportion of defective manhole covers, based on this sample?

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The executives at Sandbachian, Inc., has recently solved their widget crisis, have another problem with one of their products. Many cities are sending complaints that their manhole covers are defective and people are falling into the sewers. The workers took a random sample of 800 manhole covers and found that 40 of them were defective. What is the 95% CI for p, the true proportion of defective manhole covers, based on this sample?

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