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Assume that a sample is used to estimate a population mean u. Find the 90% confidence interval for a sample of size 59 with a mean of 59.2 and a standard deviation of 21.2. Enter your answer as an open- interval (i.e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). 90% C.I. = Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places. Check