Re: 2008 World Temperatures



On Wed, 17 Dec 2008 at 12:08:18, Graham Easterling <GEasterling@xxxxxxxxxxxxxx> wrote in uk.sci.weather :

It does minimise the error. I read my barometer to the nearest mb. If
I had 1,000 barometers calibrated to the same standard, and managed to
read them all at the same time, and took the mean, it would be
reasonable to quote it to a higher level of precision.

I was always told that you mustn't quote an average to a greater precision than the accuracy of the instrument. That doesn't necessarily mean I abide by that, though... :)
--
Paul Hyett, Cheltenham (change 'invalid83261' to 'blueyonder' to email me)
.



Relevant Pages

  • Re: Trouble with integer floating point conversion
    ... <end quote> ... An 80-bit number can hold an inaccurate number with much greater precision than an 64-bit number; in itself that doesn't make the number any more accurate. ... The values for LDBL_EPSILON, DBL_EPSILON, and FLT_EPSILON depend very directly on the precision of floating point operations, and the standard sets a maximum value for the magnitude of that constant, which implies a minimum number of bits of precision. ... The standard also says things about when it's permissible to use a higher precision type for intermediate steps in calculations, and it seems to be precisely that issue which is the actual reason for the discrepancies that the original poster reported. ...
    (comp.lang.c)
  • Re: Fadal 104/D(eceased)
    ... >> CNC controls. ... >> runtime program toggle from single precision to double precision ... >> My question is that we have standard NEMA motors, ... Why not standard controllers and g/n ...
    (alt.machines.cnc)
  • Re: Fadal 104/D(eceased)
    ... > CNC controls. ... > runtime program toggle from single precision to double precision ... > power why can't a standard ... Why not standard controllers and g/n ...
    (alt.machines.cnc)
  • Re: Fadal 104/D(eceased)
    ... > CNC controls. ... > runtime program toggle from single precision to double precision ... > power why can't a standard ... Why not standard controllers and g/n ...
    (alt.machines.cnc)
  • Re: Fadal 104/D(eceased)
    ... > CNC controls. ... > runtime program toggle from single precision to double precision ... > power why can't a standard ... Why not standard controllers and g/n ...
    (alt.machines.cnc)