You intend to estimate a population mean with the following sample. 31 42.5 39 35.5 41 33.9 37.4 37.6 42.5 1101 a You believe the population is normally distributed. Find the 95% confidence interval. Enter your answer as an open-interval. This means enter your answer inside of parentheses accurate to two decimal places (because the sample data are reported accurate to one decimal place). For example if the lower limit is 12.2 and the upper limit is 15.3 enter your answer as (12.2,15.3) 95% C.I.= Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places. Did you enter your answer as an open-interval as described above?