Determine the sample size required to estimate a population mean to within 8 units given that the population standard deviation is 55. A confidence level of 90% is judged to be appropriate. Sample...

Extracted text: Determine the sample size required to estimate a population mean to within 8 units given that the population standard deviation is 55. A confidence level of 90% is judged to be appropriate. Sample Size = Determine the sample size required to estimate a population mean to within 8 units given that the population standard deviation is 105. Use a confidence level of 90%. Sample Size = Determine the sample size required to estimate a population mean to within 8 units given that the population standard deviation is 55. Use a confidence level of 95%. Sample Size = Determine the sample size required to estimate a population mean to within 23 units given that the population standard deviation is 55. A confidence level of 90% is judged to be appropriate. Sample Size =