"Phil Allison" wrote
That'd be like a 1W 2% resistor


** WRONG !!!

Even if *both* resistors were 1% high, the series value is also
1% high.

Using resistors in series or parallel IMPROVES the % accuracy of
the final value.

Phil, those two statements appear contradictory, because your use of
"%" changes from the first to the second. Or you are wrong...

What improves is the *chance* that a resulting value will be within
tolerance. Since quoted tolerance assumes a particular distribution
of values around the quoted value, improving that chance is the same
thing as narrowing the tolerance.

cheers, Ian