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    • Thread Starter

    we have N repeated measurements x subject to random errors

    population variance is

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    the variance of the mean is

    (population variance) / N

    what does the variance of the mean represent? and how?
    • Community Assistant

    Community Assistant
    Do you know what the difference between a sample mean and a population mean is?

    The variance of the sample mean (the formula you have above) is telling you how close the sample mean is to the population mean. So a small variance of the sample mean implies the sample mean is close to the population mean.
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