On 29 Dec 2012 13:01:30 GMT
"Norman" wrote:

Nick Gardner wrote:

I thought that you always round up if 5 or greater, i.e., 15.15
will always become 15.2, and so on.

I have not heard of any other way of doing this (until now).

The standard meteorological method is to "throw it to the odd".
Therefore, 15.15 becomes 15.1 whereas 15.25 becomes 15.3. I believe
the logic in this is to eliminate systematic bias that would be
caused if rounding was always up (or down).


According to what I remember of my HNC Numerical Analysis course, the
standard method is to "throw to the even;" I assume the meteorological
reason for being the odd one out is to throw away from zero.

--
Graham P Davis, Bracknell, Berks.
Time flies like an arrow but fruit flies like a banana. [Marx]