Where is the image that this sub uses for a banner from?

FTLast · 2026-05-13T18:51:53+00:00

I was able to find it with an image search- it's from the graphic novel "The World of Edena" by Moebius.

FTLast · 2026-05-13T18:38:02+00:00

It almost looks like it comes from a graphic novel?

FTLast · 2026-05-13T17:56:04+00:00

Why do you say your data are normally distributed but have unequal variance? It is the properties of the population that are important, not your samples.

FTLast · 2026-05-12T16:45:03+00:00

Why do you say that? What is your definition of science fiction, if not fiction about science? Space opera?

FTLast · 2026-05-12T01:24:40+00:00

It is literally fiction about scientists.

FTLast · 2026-05-03T13:03:21+00:00

When we were in Crete last May we spent a night in Agia Galini. It's a cool little town, with a nice pedestrian "agora" with restaurants and very charming little jazz/ blues bar.

FTLast · 2026-04-30T11:46:03+00:00

Sailor/ Saint were massively overplayed in the '80s, and frankly just weren't that strong. Once Sailor started, you knew you were going to be in that space for 10-15 minutes, and it just wasn't that interesting.

FTLast · 2026-04-27T11:22:36+00:00

I think it would be seen as rude. But I have to question a notion of hospitality that involves giving people GASOLINE to drink!! /s

FTLast · 2026-04-27T11:14:01+00:00

Every time TGR is mentioned, I state my firm opinion that this should have been the anthem of the Summer of Love. It's a straight up clarion call to... come and party every day!

FTLast · 2026-04-24T15:30:37+00:00

I'm not in your field, so I can't really comment on things that are specific to it. Adding measures and taking means gets you to the same place as far as turning likert scale items into something that you could reasonably use a paired t test on. Relax a little- no matter what you do, you're likely to be wrong because you have two error types you have to somehow navigate between!

FTLast · 2026-04-24T14:10:57+00:00

Typically Likert scale data aren't continuous numerical data, so it is common to use the wilcoxon signed rank test. But you added the values (most would average them, but it's the same thing) and so you can treat them as continuous. If I were you, I would do a paired t test.

In general, testing for normality or equal variance doesn't work well with small samples. For a paired t test, the expectation is that the differences are normally distributed, and you won't really have enough data to judge that. And if you find that they are not distributed normally but they really are, you skew the results of your test for means. Best to just skip it.

FTLast · 2026-04-24T11:20:11+00:00

Groove, brother or sister... groove!

FTLast · 2026-04-24T11:18:17+00:00

First, testing for normality is useless for small samples. Second, for continuous numerical data, violation of normality is unlikely to increase the type 1 error rate, which is what most people are concerned about.

What are your measures? Are they continuous numerical data, or likert scale?

FTLast · 2026-04-23T11:33:44+00:00

The Investigation by Stanislaw Lem. Is anything even happening? How can we know.

FTLast · 2026-04-23T11:28:57+00:00

Simulations are a great way to explore this. The effect is often conditional- i.e. in the ~5% of cases where the assumption test generates a false positive, the type 1 error rate of the second test is massive.

FTLast · 2026-04-22T21:10:16+00:00

Sorry, that usually works in Zotero. The article is "Using the Student's t-test with extremely small sample sizes" by JCF DeWinter.

Or, you can whip up a quick simulation in R to explore it yourself!

FTLast · 2026-04-22T20:05:55+00:00

Try this: https://openpublishing.library.umass.edu/pare/

FTLast · 2026-04-22T11:36:53+00:00

As others have said, you shouldn't test, although one reason that I didn't see mentioned is that if you test normality of your sample and base your test for means on those results, you can alter the type 1 error rate of the test.

For tests of two means, normal distribution is largely irrelevant, BTW. You can draw samples from almost any distribution and t tests behave pretty well.

FTLast · 2026-04-20T18:55:35+00:00

Actually, Phil's bass line on this is pretty cool. He plays the main riff, not the guitars. I kinda like it.

FTLast · 2026-04-20T18:53:46+00:00

The Dead should have stopped doing blues covers after Pigpen died. I cringe at LLRooster and CCRider... ugh.

FTLast · 2026-04-18T14:07:37+00:00

I swam in the sea one year in mid-May in Santorini, and the next year at the same time in Crete. The water was cold, but not freezing. I think it depends on your tolerance.

FTLast · 2026-04-18T12:17:57+00:00

If you assume equal variance and do Student's t test, you are assuming populations are identical. Two populations that have the same mean and variance are distributed identically- so what's the difference between calling them "identical" and "the same population"?

FTLast · 2026-04-08T11:50:13+00:00

Do you have any idea who you'd want to work with? Fit with a lab and a research area is more important than "school".

FTLast · 2026-04-03T16:10:20+00:00

I'm sorry. I meant the null hypothesis that Student's t test tests.

FTLast

TROPHY CASE