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Data from a survey of 500 randomly selected employee found a mean age of 56.98 years...

Data from a survey of 500 randomly selected employee found a mean age of 56.98 years and the standard deviation was 7.83 years. What is the standard error of the mean?

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standard error of the mean is

SE =\sigma / \sqrt n= 7.83/\sqrt500=0.3502

SE=0.3502

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