The pages per book in a library are normally distributed with a population standard deviation of 33 pages and an unknown population mean A random sample of 16 books is taken and results in a sample mean of 334 pages What is the correct interpretation of the 99 confidence interval Select the correct answer below We estimate that 99 of the books in the library have between 312 75 and 355 25 pages O We estimate with 99 confidence that the sample mean is between 312 75 and 355 25 pages O O We estimate with 99 confidence that the true population mean is between 312 75 and 355 25 pages