Ah, because the REAL rounding rule, designed so that averages will not
become distorted high from rounding 1/2 up, is to round 1/2 to the
EVEN number.

I know of almost no teacher nor textbook that remembers this, much
less why it is so.

That's because it's not so.

The standard rounding rule is 5 goes up.

The catch is that you ONLY round from the digit after the one you're
rounding to. For example, .2447 rounds to .245 or to .24 or to .2
although a common error is to round (to the hundredths) as .25, because
the "rounded to the thousanths" version would end in a five. When
rounding, always round from the source, not an already adulterated version.

Jose
--
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