7. Bob draws a simple random sample from an original population. The sample size is n = 51, the sample mean turns out to be = 78, and the sample standard deviation turns out to be s = 14. Find the 95% confidence interval for the population mean 4. А. (74.062, 81.938) В. (74.062, 83.948) С.(74.062, 85.958) D. (74.062, 87.968)

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