The most common statistical error in this community is not technical: it is treating a self-selected collection of reports as a sample from a population.
Measurement error in home scales, with a worked standard deviation — a second dataset — setting out what I have, and where I think it stops being reliable.
Posting a small dataset on Measurement error in home scales. It is mine, it is uncontrolled, and the method is stated so it can be discounted appropriately.
What I would like is not agreement but a second dataset collected by someone with no stake in mine. If one exists I would rather read it than argue for this one.
Building on the opening post rather than restating it.
Regression to the mean: if you select people with extreme values (very high or very low), their next measurement is often less extreme just by chance. This can look like a treatment effect when it is just statistics.
| Topic | Participants | Replies | Views | Activity |
|---|---|---|---|---|
|
Second pass at: Absence of evidence and evidence of absence
On the subject in the title: Second pass at: Absence of evidence and evidence of absence Working notes rather than a conclusion. Two things I would like separated before anyone answers on Absence of evidence,…
|
+50 | 55 | 18k | 16h |
|
Regression to the mean in progress reports
On the subject in the title: Regression to the mean in progress reports Working notes rather than a conclusion. Something about regression does not reconcile and I would like a second pair of eyes before I…
|
+30 | 34 | 49k | 12mo |
|
[2026 update] Correlation in a self-tracked dataset: what it can support
Posting this under the heading it deserves: Correlation in a self-tracked dataset: what it can support Everything below is what sits behind that. Posting a small dataset on Correlation. It is mine, it is…
|
2 | 31k | 6h | |
|
What a confidence interval means, from scratch — the long version
The question in the title: What a confidence interval means, from scratch — the long version I will give what I have already checked below so nobody repeats it. Asking about confidence interval directly,…
|
+16 | 20 | 2.3k | 8mo |
|
Second pass at: Regression to the mean in progress reports
Second pass at: Regression to the mean in progress reports Writing it up because I had to work it out twice and would rather nobody else did. Posting a small dataset on Regression. It is mine, it is…
|
+71 | 75 | 4k | 17mo |
| Topic | Participants | Replies | Views | Activity |
|---|---|---|---|---|
|
Sample size intuition for a personal experiment
On the subject in the title: Sample size intuition for a personal experiment Working notes rather than a conclusion. A follow-up question about sample size intuition that I did not know to ask the first time.…
|
4 | 62k | 18mo | |
|
Preprint servers and what screening they do — the long version
On the subject in the title: Preprint servers and what screening they do — the long version Working notes rather than a conclusion. A preprint question rather than a question about the finding in it. The…
|
+7 | 11 | 26k | 4mo |
|
Tirzepatide's shorter half-life and its one practical consequence
On the subject in the title: Tirzepatide's shorter half-life and its one practical consequence Working notes rather than a conclusion. Documentation question rather than a pharmacological one, but about this…
|
+18 | 29 | 20k | 8mo |
|
A pooled estimate that changed when one trial was added
A pooled estimate that changed when one trial was added — setting out what I have, and where I think it stops being reliable. I was wrong about pooled estimate in a thread last spring and I would like to…
|
+24 | 28 | 3.5k | 2d |
|
Journal club: SUSTAIN 6 and its retinopathy signal — does this still hold?
The question in the title: Journal club: SUSTAIN 6 and its retinopathy signal — does this still hold? I will give what I have already checked below so nobody repeats it. Reading SUSTAIN 6 ( N Engl J Med ,…
|
+60 | 66 | 12k | 16mo |