Estimating a Population Mean

3. A laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with s = 17.6 milligrams. Construct a 95% confidence interval for the true mean cholesterol content of all such eggs. Assume that the amount of cholesterol in eggs is normally distributed. Write the conclusion: Use the given information to find the minimum sample size required to estimate an unknown population mean. Round your answer to the nearest whole number. 4. Margin of error: $126, confidence level: 99%, o = $512 5. How many business students must be randomly selected to estimate the mean monthly earnings of business students at one college? We want 95% confidence that the sample mean is within $135 of the population mean, and the population standard deviation is known to be $538