roxy_nash said:Whatever the answer turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, and invite the…
Adding a me-too, because a thread of one person's experience is not much use. Posting only so the count is not one.
roxy_nash said:Whatever the answer turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, and invite the…
Coming at roxy_nash’s question from a different direction. The honest answer is that the effect is real, the magnitude is contested, and the individual variation is larger than either. Those three things can all be true at once, and most arguments here are two people holding different parts of that.
The figures, for anyone assembling their own picture. One practical note: write down what you did and when, before you need it. Reconstructing a timeline from memory three months later is how people end up unable to answer the one question that would have resolved it.
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Shop Reference StandardsA narrower follow-up, since the general answer is now clear:
How would you tell the difference between that and the alternative explanation?
Closing the loop on my own question.
Update: the thing I was blaming turned out not to be the cause. Leaving the original post as written rather than editing it, so the mistake stays visible for whoever searches this next.