A simple random sample of 1600 families is chosen. what is, Ask an Expert

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Certain town has 25,000 families. These families own 1.2 cars on the average; the SD is 0.90. And 10% of them have no cars at all. As part of an opinion survey, a simple random sample of 1600 families is chosen. What is the chance that between 9% and 11% of the sample families will not own car?

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