Question: sample size? We want to estimate the population mean within 21, with a 90% level of confidence. The population standard deviation is estimated to be

sample size? We want to estimate the population mean within 21,

sample size?

We want to estimate the population mean within 21, with a 90% level of confidence. The population standard deviation is estimated to be 60. How large a sample is required? (Round the intermediate calculation to 2 decimal places. Round the final answer to the nearest whole number.) Sample size

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