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This question already has an answer here:

I want to estimate the population mean using 100 samples. The reasonable estimate of the population mean is the sample mean. I am wondering, why bootstrap can give more accurate result than the sample mean? I mean, when I am doing resampling, will I get more information about the sample in order to infer the population parameter?

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marked as duplicate by kjetil b halvorsen, gung, Xi'an, Scortchi Apr 9 '15 at 15:32

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    $\begingroup$ This question might be of interest: stats.stackexchange.com/questions/26088/… $\endgroup$ – jld Apr 9 '15 at 13:54
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    $\begingroup$ The bootstrap mean equals the sample mean, so it will never give a more accurate result for this particular estimator. The bootstrap might give you useful information about the sampling distribution of the mean. $\endgroup$ – whuber Apr 9 '15 at 14:08