K Find the sample size needed to estimate the population mean within $0.50, given o =...

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K Find the sample size needed to estimate the population mean within $0.50, given o = $4: (a) using a confidence level of 90% (b) using a confidence level of 96% Remember to round up to an integer. (a) at the 90% confidence level n = (b) at the 96% confidence level n = K Find the sample size needed to estimate the population mean within $0.50, given o = $4: (a) using a confidence level of 90% (b) using a confidence level of 96% Remember to round up to an integer. (a) at the 90% confidence level n = (b) at the 96% confidence level n =