A sample of n=15 was collected having data:5,6,8,6,7,4,8,3,5,2,3,7,9,4,8 and was to be used to estimate the unknown population parameter. Which of the following is the correct 95% confidence interval estimate for the population mean (Assume t-critical value for the two-tailed test =2.145 at 5% with a df of 14)

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