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20. We want to estimate the population mean within 5, with a 99% level of confidence. The population standard deviation is estimated to be
20. We want to estimate the population mean within 5, with a 99% level of confidence. The population standard deviation is estimated to be 15. How large a sample is required?
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Statistical Inference
Authors: George Casella, Roger L. Berger
2nd edition
0534243126, 978-0534243128
