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Chelsea Parlett

@chelseaparlett

Ph.D, stats lover/writerโœ๐Ÿผ, #statistics #scicomm #datascience #statstiktok ๐Ÿ‘ฉ๐Ÿปโ€๐Ÿ’ป she/her

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Latest posts by Chelsea Parlett @chelseaparlett

I think itโ€™s the same reason I find Numerical Analysis interesting.

How FUN to think about issues that mainly arise when calculating things on computers with finite precision ๐Ÿคฏ e.g. a loss of sparsity when calculating something that analytically, preserves sparsity

08.03.2026 17:24 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

(And please NOTE THAT IM SAYING FASCINATING NOT USEFUL-FOR-YOUR-PARTICULAR-APPLICATION ๐Ÿ˜Œ)

08.03.2026 17:22 ๐Ÿ‘ 8 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

The most fascinating applications of statistics are the ones where you have to creatively work around pragmatic constraints.

E.g. quasi experimental methods.

08.03.2026 17:20 ๐Ÿ‘ 15 ๐Ÿ” 1 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
A book called โ€œjโ€™apprends a programmer avec pythonโ€ a French book on programming with python

A book called โ€œjโ€™apprends a programmer avec pythonโ€ a French book on programming with python

Mon mari mโ€™a achetรฉ une livre de Python en franรงais pour mon anniversaire.

Bien que je connaisse bien Pythonโ€ฆle franรงaisโ€ฆBEAUCOUP moisโ€ฆ๐Ÿ˜‚ alors je vais apprendre rapidement.

07.03.2026 02:39 ๐Ÿ‘ 12 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

* so much respect to those who design it. I feel like stats is not something you can teach well if you are forced to assess via a standardized test (much of which is MCQs)

07.03.2026 01:29 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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a cartoon cat with an angry face is standing on its hind legs . ALT: a cartoon cat with an angry face is standing on its hind legs .

Iโ€™ve been helping a friends kid study for the AP stats exam.

I forgot how much beef I have with the AP Stats curriculum* ๐Ÿ˜‚

07.03.2026 01:29 ๐Ÿ‘ 16 ๐Ÿ” 1 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 0
A person with a microphone saying โ€œ because I think that something awaits me in the divine for resistingโ€œ

A person with a microphone saying โ€œ because I think that something awaits me in the divine for resistingโ€œ

Them: why do you keep calling yourself a โ€œstatisticianโ€ instead of a โ€œdata scientistโ€

Me:

06.03.2026 23:22 ๐Ÿ‘ 181 ๐Ÿ” 16 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1

Unfortunately all my data is shited ๐Ÿ˜”

06.03.2026 20:35 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

My query just failed to run because I referenced a CTE as โ€œunshitedโ€ ๐Ÿ’ฉ instead of โ€œunshiftedโ€ soโ€ฆ

06.03.2026 20:19 ๐Ÿ‘ 16 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0
Me looking annoyed

Me looking annoyed

Yeah my face is stuck like this now๐Ÿ˜”

06.03.2026 18:48 ๐Ÿ‘ 7 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

We LOVE DATA ENGINEERS ๐Ÿ™‡๐Ÿปโ€โ™€๏ธ

06.03.2026 18:38 ๐Ÿ‘ 13 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
My corgi nova looking suspicious

My corgi nova looking suspicious

Me when I canโ€™t SELECT * FROM AMAZING_DATA.CLEAN_TABLE

06.03.2026 03:49 ๐Ÿ‘ 36 ๐Ÿ” 1 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 2
Santa climbs in a window, sees a letter written to him from a small child who is sleeping. The letter reads โ€œobserve the counter factualโ€. After reading this Santa tries to shoot the child.

Santa climbs in a window, sees a letter written to him from a small child who is sleeping. The letter reads โ€œobserve the counter factualโ€. After reading this Santa tries to shoot the child.

๐ŸŽ…

04.03.2026 07:24 ๐Ÿ‘ 15 ๐Ÿ” 3 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 1
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a cartoon of spongebob holding a piece of paper with memecenter.com written on the bottom ALT: a cartoon of spongebob holding a piece of paper with memecenter.com written on the bottom

The technically perfect CI interpretation

04.03.2026 07:17 ๐Ÿ‘ 7 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I actually donโ€™t mind โ€œthereโ€™s a 95% chance this kind of interval containsโ€ฆ.โ€๐Ÿค”

04.03.2026 07:05 ๐Ÿ‘ 7 ๐Ÿ” 0 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 0

๐Ÿ’€

04.03.2026 07:00 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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a close up of a cartoon character 's face wearing glasses ALT: a close up of a cartoon character 's face wearing glasses
04.03.2026 06:30 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

that does not meaningfully improve peopleโ€™s ability to live and work with CIs ๐Ÿซจ Iโ€™ve had every opinion about CIs under the sun, but this is the most peace I have felt about them ๐Ÿง˜โ€โ™€๏ธ๐Ÿง˜โ€โ™€๏ธ๐Ÿง˜โ€โ™€๏ธ

04.03.2026 06:26 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

Mattanโ€ฆI cannot do it anymore ๐Ÿง˜โ€โ™€๏ธIโ€™m sick of wasting my time with a technically correct but practically meaningless interpretation of CIs. Weโ€™re confusing people with the โ€œ95% confidentโ€ language in order to eke out a tiny bit more technical accuracy

04.03.2026 06:26 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

above, perhaps a bit Bayesian?) to say thereโ€™s a 95% chance my interval contains mu

04.03.2026 06:18 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

- while technically the prob is 0/1 I canโ€™t actually observe that, so I rely on my knowledge that under blah blah assumptions, in the long run, 95% of the confidence intervals constructed in this way contain mu. So without further knowledge about MY interval, I think itโ€™s fine (though I admitted

04.03.2026 06:18 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Why is it wrong (Iโ€™m not asking because I think itโ€™s perfectly, technically correct, but because I think the reason people say itโ€™s incorrect doesnโ€™t really matter)

- The statement reflects the idea that frequentists view the sample as random (and therefore the interval) not the parameter

04.03.2026 06:18 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 0

95% confident is just a way to be technically correct by being unclear

04.03.2026 04:48 ๐Ÿ‘ 12 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Just say thereโ€™s a 95% chance my interval contains the pop mean.

(Itโ€™s better than saying thereโ€™s a 95% chance the pop mean is in my interval. I cant do the whole โ€œitโ€™s either 0 or 1โ€ thing. Im embracing the bayesian probability interpretation)

04.03.2026 04:48 ๐Ÿ‘ 24 ๐Ÿ” 0 ๐Ÿ’ฌ 5 ๐Ÿ“Œ 2

And honestly what the fuck does that even MEAN?! Nothing.

04.03.2026 04:05 ๐Ÿ‘ 16 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0
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a cartoon character named stitch is standing in a field with trees in the background ALT: a cartoon character named stitch is standing in a field with trees in the background

Drilling students into memorizing the โ€œwe are 95% confident thatโ€ฆ.โ€ Language is USELESS if you dont teach them what that MEANS

04.03.2026 04:05 ๐Ÿ‘ 50 ๐Ÿ” 1 ๐Ÿ’ฌ 8 ๐Ÿ“Œ 1
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Donate to the ACLU Fight back against bigotry, injustice and inequality. Make your donation to the ACLU today.

Just saw that @aclu.org is suing over this!

action.aclu.org/give/pm-dona...

03.03.2026 05:11 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Ugh I want that to be true ๐Ÿ˜ญ I hope it is true, but Iโ€™m fearful itโ€™s not

02.03.2026 21:10 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Itโ€™s the literal least anyone can do ๐Ÿ˜ญ

02.03.2026 21:09 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

- real sus that you want to require specific ID to vote and then immediately set precedent to instantaneously invalidate peopleโ€™s ids

- this also includes a โ€œbountyโ€ on trans people using the bathroom. Which is so disgusting I cannot even express how bad of an idea this is

This is deeply alarming.

02.03.2026 19:48 ๐Ÿ‘ 28 ๐Ÿ” 4 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0