An acceptable standard deviation depends entirely on the study and person asking for the study. The smaller the standard deviation, the more acceptable it will be because the less likely there are to be errors.
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Information is not sufficient to find mean deviation and standard deviation.
Standard deviation is the square root of the variance.
Standard deviation is a statistical concept and not applicable to concrete.
we calculate standard deviation to find the avg of the difference of all values from mean.,
Standard deviation can be greater than the mean.