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3. If the random error in the arithmetic mean of 50 observations is a, then the random error in the arthmetmean of 150 observations would be(2) 3α (4) 2α

Answer» 3. If the random error in the arithmetic mean of 50 observations is a, then the random error in the arthmetmean of 150 observations would be(2) 3α (4) 2α


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