Rounding Results for Comparison with Specification - Pharmaceutical Technology

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Rounding Results for Comparison with Specification
The mysteries of rounding are exposed.


Pharmaceutical Technology
Volume 37, Issue 4, pp. 122-124

4. Round 0.005000 to 2 decimal places.


Rules 1 and 2 both give the answer ‘No,’ therefore, rule 3 is invoked. As Z=0, rule 3 answer is ‘Yes’ and the digit before X is even, therefore, round down to 0.00.

The last example may give rise to surprise because by the simple rules it would be deemed incorrect. However, it would be unlikely to find such an example in analysis unless the method is only capable of giving rise to 5 or 0 for Y.


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