8.41 Length of hospital stay for childbirth Data was collected from the records of 2962 patients admitted to a hospital in 2015 to estimate the mean length of stay for childbirth.

It was observed that the sample mean was 2.372 days and the margin of error for estimating the population mean is 0.029 at a confidence level of 95%. Explain the meaning of the last sentence, showing what it suggests about the 95%

confidence interval. Find the sample standard deviation.