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If mean and standard deviation of 5 observations x1,x2,x3,x4,x5 are 10 and 3, respectively, then the variance of 6 observations x1,x2,⋯,x5 and −50 is equal to : |
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Answer» If mean and standard deviation of 5 observations x1,x2,x3,x4,x5 are 10 and 3, respectively, then the variance of 6 observations x1,x2,⋯,x5 and −50 is equal to : |
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