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The mean and standard deviation of 10 observations x_(1), x_(2), x_(3)…….x_(10) are barx and sigmarespectively. Let 10 is added to x_(1),x_(2)…..x_(9) and 90 is substracted from x_(10). If still, the standard deviation is the same, then x_(10)-barx is equal to |
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Answer» 35 |
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