Determine the minimum sample size required when you want to be 99% confident that the sample mean is within one unit of the population mean and sigma equals 16.3. Assume the population is normally distributed.
Z for 99% confidence interval = Z0.005 = 2.576
Margin of error = Z0.005 * sd / sqrt(n)
or, 1 = 2.576 * 16.3 / sqrt(n)
or, n = 1763.1
or, n = 1764
Determine the minimum sample size required when you want to be 99% confident that the sample...
Determine the minimum sample size required when you want to be 90% confident that the sample mean is within one unit of the population mean and sigma=19.8. Assume the population is normally distributed. A 90 % confidence level requires a sample size of?
Determine the minimum sample size required when you want to be 90% confident that the sample mean is within one unit of the population mean and sigma=19.3. Assume the population is normally distributed. A 90 % confidence level requires a sample size of nothing. (Round up to the nearest whole number as needed.)
Determine the minimum sample size required when you want to be 95% confident that the sample mean is within one unit of the population mean and standard deviation is 15.9. Assume the population is normally distributed.
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