[sdiy] really basic question .. tolerance

[diysynth]

HI all,

> Please show me an example of two 1% resistors in series or parallel where
> the tolerance exceeds 1%. I heard this rule many times but I can't see it.

Perhaps, it would be an idea to measure the variance (i.e. distribution) of
100 resistors with 1% tolerance and then to try out ALL (ALL!!!)
combinations of 2 of these resistors to get the variance of the serial
resistance.....

I am sure, that tolerance (of course the MEAN tolerance of all these
combinations) would exceed 1%. This is a statistical law.

But I may be wrong, someone here, who can prove this ?

Joerg