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A sample of 250 had a mean of 120 with a standard deviation of 67 . Calculate the 95% confidence interval for the population mean.

A sample of 250 had a mean of 120 with a standard deviation of 67 . Calculate the 95% confidence interval for the population mean. a. 111.69128.31 b. 181.91148.22 c. 120.69156.23 d. 124.69143.88

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