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A polulation has standard deviation of 50. A random sample of 100 items from this population is selected. The sample mean is determined to be 600.At 95% confidence, the margin of error is?
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Let X(bar) 6 denote the sample mean of a sample X 1 , X 2 , ..., X 6 from Unif (-1, 3). (a) What is the expected value of X(bar) 6 ? (b) What is the variance of X(bar) 6 ?
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