[sdiy] really basic question .. tolerance

[Theo]

I always assumed it was like: 99,5% of the 1% resistors are within 1% range
of the listed value.
Almost all tolerances work like this, popular percentages are 95% to 99,8%.
If the tolerance % was a hard border the manufacturer would have no choice
but to test _all_ resistors for their value.

Theo


From: Ian Fritz <ijfritz at earthlink.net>


> Um ... I still have a question.
>
> When I buy a 1% resistor is its value guaranteed to be within 1%, or is it
> just that some point on the statistical distribution ( the 2-sigma point
or
> whatever) is at 1%?
>
> I've always assumed the former, but is
> this correct?
>
>    Ian
>