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If there are 50 pieces of data which range from 0 to 100:

- With a mean of 60 and Root mean square deviation of 8 show that only 1 piece of data can equal 100

- With a mean of 60 and Root mean square deviation of 8.2 show that only 2 (or less) pieces of data can equal 100

- With an Root mean square deviation 4√2 or less show that no pieces of data can equal 100

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