while im here if you are testing to settle an argument you will not settle it with n of 1
#test-results 2025-07-03
Thursday35 messages7 participantstimes are UTC
Highlights from this day
- month_six_me — does anyone log the negative results, the boring ones 13:32
- apnoea_down_two — genuine question my sheet has 5 lots from HJ with a spread under a point, which is tight 13:43
- pinch_not_stretch — quantity testing is usually a separate line item and it is the one worth paying for, we shall see 14:30
- assay_not_purity — update on the earlier thing a single sample tells you about a single vial. that is genuinely all it tells you 15:03
- fake_tracking — 97.4 against a certificate of 96.8 is fine. the same supplier landing low four times in a row is a question, n of 1 obviously 16:14
sorry to jump in a point or two between the certificate and an independent result is inside what two labs disagree by
quick one whats the worst result anyone has logged and what happened next
the results in this channel skew because people test when they are suspicious. that is selection bias and it is real
log the boring ones
test it again
while im here i test roughly every tenth vial. it is a sampling strategy, not paranoia
does anyone log the negative results, the boring ones
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selection bias
thats a fill problem
genuine question my sheet has 5 lots from HJ with a spread under a point, which is tight
one data point
🙏4
update from 21 months ago: retested the same supplier, result came back better, logged both
quantity testing is usually a separate line item and it is the one worth paying for, we shall see
🤝8😂13
how many lots do you need before you can say anything about a supplier
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update on the earlier thing a single sample tells you about a single vial. that is genuinely all it tells you
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thats within range
🔥1
my vial assayed under label but the purity was fine, which matters more
do the results in this channel skew because people test when suspicious
for the archive i have never regretted spending the money on a test. i have regretted not testing twice
log the boring results too. a channel that only records failures produces a false picture
one bad test does not condemn a supplier. one good test does not clear one. both halves get ignored equally
if the vial has been through a bad transit you are testing the transit as much as the supplier
is it worth testing if the vial has already been through a warm transit
thats not great
how much does sample handling on my end affect the number
weigh it first
97.4 against a certificate of 96.8 is fine. the same supplier landing low four times in a row is a question, n of 1 obviously
assay under label with good purity means you got less of the right thing. that is a fill problem, not a synthesis problem
attach the pdf
is anyone tracking results over time in a way they would share
the widest spread in my data is about 2.6 percentage points across five lots from one supplier
my result contradicts the supplier certificate, do i tell them