Adding the numbers, since they settle part of this. Keep the original post as written when you update it, and add the correction underneath. An edited-away mistake is invisible to the next person who makes it.
One thing that is still open after Dr.Martinez’s answer:
What would you measure differently if you were starting again?
LabKate said:Keep the original post as written when you update it, and add the correction underneath.
Careful with the causal language. Two things moving together in a period when five things changed is not a mechanism, and stating it as one makes the thread less useful to somebody reading it later.
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Shop Reference StandardsLabKate said:Keep the original post as written when you update it, and add the correction underneath.
Correct as far as it goes. The part it does not cover is what to do when the honest answer is "not enough data", which is more often than anyone likes.
Reporting back.
Closing this out: the trough rather than the peak explains the pattern I was seeing on day six, which I had been blaming on the vial.