A laboratory tested a simple random sample of twelve chicken eggs and found that the mean amount of cholesterol was 215 milligrams with s = 19.8 milligrams. Assume that the population of these amounts is normally distributed. Construct the 95% confidence interval estimate of the population mean. Round the confidence interval estimates to one decimal place unless indicated otherwise.

Find the P-value for the indicated hypothesis test. Round all proportions and standard scores to two decimal places.