apter 8 Confidence Intervals (Mean) e Friday by 11:59pm Points 4 Submitting an external tool chapter 8 Confidence Intervals (Mean) core: 1.5/4 1/4 answered Question 4 Assume that a sample is used to estimate a population mean u. Find the 90% confidence interval for a sample of size 57 with a mean of 32.1 and a standard deviation of 14.2. Enter your answer as an open-interval (i.e., parentheses) accurate to 3 decimal places. 90% C.I. = The answer should be obtained without any preliminary rounding. Submit