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Standard error of the mean for a sample of size

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Reference no: EM132053641

The standard error of the mean for a sample of size 167 is 25. In order to cut the standard error of the mean in half (to 12.5) we must select a sample size of 83.5 selected answer (wrong)

Please help me understand how I got the wrong answer.

Reference no: EM132053641

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