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Earn +20 ptsQ: Weighted mean sample problem
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How do you calculate the standard deviation of the mean using Excel?
=stdev(...) will return the N-1 weighted sample standard deviation. =stdevp(...) will return the N weighted population standard deviation.
The weighted mean is a special case for?
The weighted mean is simply the arithmetic mean; however, certain value that occur several times are taken into account. See an example http://financial-dictionary.thefreedictionary.com/weighted+average
The weighted mean is a special case of the?
Geometric mean
What happens to the sample mean as the sample size increases?
With a good sample, the sample mean gets closer to the population mean.
What is the formula for a weighted standard deviation?
Arithmatic Mean
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