Dr.Martinez said:Worth answering the question that was asked rather than the one behind it.
Adding a me-too, because a thread of one person's experience is not much use. I had assumed I was the exception until I read this.
Dr.RaviCardio said:Practical: whatever you change, write down the date and the reason.
Coming at Dr.RaviCardio’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.
I would rather be corrected than agreed with, if it comes to it.
The figures, for anyone assembling their own picture. One habit that pays for itself: post the method alongside the number. A figure without its method cannot be checked, and an unchecked figure is how this community accumulates folklore.
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Shop Reference StandardsFollowing on from Dr.RaviCardio — and this may be the naive question:
What would you measure differently if you were starting again?
Moderator note: two posts asking for a source have been merged into one. Please search the thread before asking again. Thread quality here is what the rules are for. Keep it up.