7. If a constant value 50 is Subtracted from each observation of a set,the mean of the set is
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Step-by-step explanation:
Variance is the mean of the squares of the deviations from the mean. Therefore, if a constant value that is 15 is subtracted from each observations of the set, then the variance will not be altered as the effect of such a act will be managed at the time of calculating the deviations of the series.
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