Samples of DNA are collected, and the four DNA based of A, G, C, and T are coded as 1,2,3, and 4 respectively. The results are listed below. Construct a 95% confidence interval estimate of the mean. What is the practical use of the confidence interval? 2,2,1,4,3,3,3,4,4,1 What is the confidence interval of the population mean u? __ < u < __ What is the practical use of the confidence interval? Select the correct choice below and if necessary, fill in the answer boxes to complete your choice. A. The confidence interval can be used to estimate that 95% of all people have DNA bases between __ and __. (Round to one decimal places as needed.) B. The given numbers are just substitutes for the four DNA base names, so the numbers do not measure or count anything, and they are at the nominal level of measurement. The confidence interval has no practical use. C. The confidence interval can be used to estimate that, with 95% confidence, the interval from __ to __ actually contains the true mean DNA base of all people. (Round to one decimal place as needed.)