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It is known that the variance of a population equals 484. A random sample of 81 observations is going to be taken from the population.A. With an 0.80 probability, what is the sampling error?B. With an 0.80 probability, how large of a sample would have to be taken to provide a sampling error of 3 or less?
It is known that the variance of a population equals 484. A random sample of 81 observations is going to be taken from the population.A. With an 0.80 probability, what is the sampling error?B. With an 0.80 probability, how large of a sample would have to be taken to provide a sampling error of 3 or less?
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