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You want to obtain a sample to estimate a population mean. Based on previous evidence, you...


You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard de
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 21.3. You would like to be 95% confident that your estimate is within 5 of the true population mean. How large of a sample size is required?
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na sample size. Moegin error Standard error x critõe al vuelve e. = 5 = x Zaje x= torgh x 1.96 5 zotara => 21,3 + Ton El ith

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