a +/- 0.1% meter, reading "100.00"
a +/- 0.1% meter, reading "100.00"
(OP)
The likelihood of the true value of what you're measuring actually being 100.00 is virtually zero.
There's a 95% chance the true value is between 100.10 and 99.90.
There's a 68% chance the true value is between 100.05 and 99.95.
Agreed?
There's a 95% chance the true value is between 100.10 and 99.90.
There's a 68% chance the true value is between 100.05 and 99.95.
Agreed?





RE: a +/- 0.1% meter, reading "100.00"
And, lacking any evidence to the contrary, you'd have to assume an even distribution. The error might be quite systematic and primarily composed of an unknown fixed offset guaranteed to be within the specified limits. Of the total error budget, it's likely that only a small part is made up of natural variations where bell curve math would apply.
RE: a +/- 0.1% meter, reading "100.00"
This may come up a lot for me, so aside from the uniform distribution assumption do you have a link for this kind of not-very-well-known info (interpreting meter tolerance specs)?
RE: a +/- 0.1% meter, reading "100.00"
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: a +/- 0.1% meter, reading "100.00"
http://en.wikipedia.org/wiki/Accuracy
But keep in mind that some people literally spend a lifetime immersed in this subject.
RE: a +/- 0.1% meter, reading "100.00"
Re: lifetime, I might have once applied to the NIST; I can't recall. It's only up the road from me.
RE: a +/- 0.1% meter, reading "100.00"
http://physics.nist.gov/cuu/Uncertainty/index.html
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: a +/- 0.1% meter, reading "100.00"
RE: a +/- 0.1% meter, reading "100.00"