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  4. The standard deviation of 15 items is 6 and if each item is decreased by 1, then standard deviation will be

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Q. The standard deviation of 15 items is 6 and if each item is decreased by 1, then standard deviation will be

JamiaJamia 2015

Solution:

We know that, standard deviation is independent of change of origin. Hence, if each item is decreased by 1, then standard deviation will be same i.e. 6.