Chi-Square Tests: Crash Course Statistics #29
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- Опубликовано: 27 сен 2024
- Today we're going to talk about Chi-Square Tests - which allow us to measure differences in strictly categorical data like hair color, dog breed, or academic degree. We'll cover the three main Chi-Square tests: goodness of fit test, test of independence, and test of homogeneity. And explain how we can use each of these tests to make comparisons.
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Idk why this is so difficult. The math isn't hard, it's just the process and logic that really messes with my brain 😭
Every AP Bio student quaking
FACTS
IB :)
IB bio hère, haven’t done this in quite a bit and paper three is in two hours ish
A2 stud here XD
YES OML
This is CrashCourse's 1000th video.
Is it? I wonder..
I followed you through the explanation and enjoyed it until the point where you determine whether to accept or reject the null hypothesis. It would be nice in future to show what you referred to when comparing the results of your chi-square test to determine whether it is above or below the critical value (i.e a chi-square table)
An easier way to calculate the expectant frequencies is to use the equation (total of column * total of row)/ sample size. So (161 * 479) / 1000 = 77.12. The way they present it is confusing.
Well done Crash Course on uploading your 1000th video! Seemed statistically significany enough to point out :P Thanks for the wealth of learning material you've provided to so many people around the world. Can't wait to see where the next 1000 will take us!
6:58 I had to repeat this part cause I was taken aback by the unexpectedly large number of people who like pineapple on pizza and couldn't focus on what she was saying.
Love ur content, im a peruvian physician taking a master in epidemiology , so biostatistics are a smash in our heads, ur videos are so useful!
Today I was precisely looking for a Chi square video explanation and I found this video (uploaded yesterday). We're entuned.
who else would like the League of Lemur to be a real game?
YASSSS
My favorite statistics series
I wanna be a fighter lemur
This is really useful, and I'm definitely further forward than I was 15 minutes ago - I understand where the chi-square statistic comes from, but I don't get how to determine the P-value from that
Another excellent video! Very well explained on a concept that is difficult for many students. The Chi Square test is used in finance too!
I skipped ahead when I saw the league of lemurs bc I thought it was an ad lol
bruh. why does she have to be so fast in stringing and saying statements that we have to digest to understand the concept... this is cooked. anxiety says no thanks.
Very well explained. thanks for an amazing contribution. Things are really well related and narrated.
When I read Wikipedia about statistics, there seems to be some political division between advocates of Bayes theorem and advocates of traditional statistics. Is this division an illusion?
Oh you meant Bayesians vs Frequentists? It's basically kinda like Mathematicians vs Physicists, or Pi vs Tau.
Right. There is no disagreement on the math, right? They may just the disagree on the interpretation.
For example both parties would agree that chi squared distribution is appropriate for this situation, yes?
Bayesians and frequentists like to use different methods, but there's also a sort of philosophical divide over how to think about hypotheses and probabilities. I recommend reading some stats blogs if you want to know more. Wikipedia's stats articles can be nigh-on impenetrable, but there are a lot of good and accessible stats bloggers on both sides of the Bayesian/frequentist divide.
Thanks Adriene, you are a lifesaver!
This is an amazing explanation! Well done!
League of Lemurs, nice parody of HotS and DotA. ^_^
Kappa
One thing about the cat/dog owners. We would have to make sure no cat owner also owns a dog or vice versa, otherwise chi square is not mutually exclusive - there for not valid. Otherwise, love your videos!
This was fantastic. Great work.
Leauge of Lemurs lol! XD What class do I choose if I wanna be a spell caster?
wouldn't be healer
woudn't be a tank too
this video was very helpful and easy to understand, thank you
I'd play the hell out of League of Lemurs
It a great video on statistical concept however, the presenter should talk and explain a bot slower! You are too fast to be understood Amazing Lady!
Where was this video when I took Quantitative Methods last semester 😑
you just do quatitative? bruh... my unit has both quantitiative and qualitative methodologies to study....
where can I download this lemurs games pls
Thankyou.
A survey of 320 families with 5 children each revealed the following distribution: No. of boys 5 4 3 2 1 0 No. of girls 0 1 2 3 4 5 No. of families 14 56 110 88 40 12 Is the result consistent with hypothesis the male and female birth are equally probable?
Always a pleasure
Ayayay! Box and whiskers plot at the back! *heart*
Brilliant video, thanks!
Thank you again ❤❤❤❤ ❤
Best video ever
Now I want to play League of Lemurs XD
Can I get a link to download League of Lemurs after I’m done with my dissertation? 🥺🥺🥺
We know what time it is and where we stand don't we.
Why in chi square expected frequency for every cell is greater than 5?
2:30 League of Lemurs!!!!
Slytherin and I love pineapple on pizza
great video
I was with her pretty much the whole way but then right around minute 9, she completely lost me... Aaaaaaahh!! :(
Why chi-square distribution looks like that weird shape??
There is not a reason behind its shape. It is just the way it looks like.
where can I play League of Lemurs? Asking for a friend ...
Haaahahahha League of Lemurs hahahahha
Zenilman AP Bio!
lmao
only more confused.. this makes no sense..
Damn so useful
she has nice eyes
@ 9:28 i dont get 1.6 . Shouldnt it be 3.4?
If chi-square came out this late in the series, then there might be something wrong with the curriculum I attended to in college. Chi-square was taught to us in the beginning of the course (just few days into it)
I really appreciate that you guys are making these videos, but I was pretty disappointed in the statistics crash course.
First of all I don't recognize any of the variable names on the screen. Using broken words like "Exp" or "Obs" is confusing as hell, in fact in product design it is considered an obsolete practice. Just use designated variable names like x and n.
I appreciate the real life examples but stick to one example, and expand on it. Establishing an entirely new context in your mind every 2 minutes is not easy when you're trying to pay attention to the lecture. And you really have to explain the connection for each example, not just move on and give 3 more before the first one gets through.
Her pace and way of talking really throws me off. I dunno if she doesn't have enough energy and she seems to assume I know everything, or if she's being drowned in distractions. She doesn't solve any problem examples and uses too many words to explain an otherwise simple concept. And what is that annoying noise when the text is being displayed? So distracting.
I really preferred your Psychology crash course much better. Sorry 🤷🏻♂️
Honestly these videos do move really fast. In my opinion you have to be quite familiar with statistics to get a benefit from the videos in just one watch. They're very wordy, and fast.
No more Maggie
How did you get P as 0.3 I didn't get it
EnigmaticSkygazer check the value of chi squared (3.9) and look on tables with df=3
Yo
Hi
bye
The graphics are so distracting.
Damn no McNemar’s Test huh?
Chukte lamakshuk fama lo ki he? Ram chuckte luky tomchik ki he?
@@sudeepjoseph69 What?? Idk the language you're speaking dude.
@@CatCamryn HAHAHA. Loke gayinga! Mer chuckte ki he lo! HAHAHA
@@sudeepjoseph69 ah yes loke gayinga indeed.
*league of lemurs!!*
Who else can only think of John Green when the intro music plays?
Too fast. Edited to take out the pauses for thought. I need those pauses. Not stop chatter is too mind boggling. Thank you, anyways.
This came to late, had my exam on monday
AVE drums lol what exam
league of lemurs LMAO
Fifth
why am I not surprised that the two highest houses were Hufflepuff and Ravenclaw xD I'm a Hufflepuff. I guess lots of nerds are affable or intelligent.
League of lemurs lol
Taii potatoie 🤣🤣🤣
First.
Luke Leighton nope I was a sec earlier
Nooooooo! 😢
😂
2000th view
First
All the people who said they love pineapple on pizza are probably trolling, thus making it inaccurate data.
please try to stop talking too much and give more necessary info
filth
I do not believe that there would be more people that like pineapple on pizza than not no matter what survey it is. Even if it's at a pineapple pizza convention it should still be the minority. This data is false!
51% of nerdfighters are wrong about pineapple on pizza... Also I may be a Slytherin
blah blah blah blah..... the laziest crash coarse ever!!!! wasted 11:03 minutes of my life...
Bro i feel even dumber after this video wtf
same, bro
I didn't get it either and not getting it made me sad.
same here
Bro i guess i should just stick to biology crash course. This one flew right of my head
ANOVA and regression next pls
My favorite statistics documentary series is PBS ANOVA
Who does this in A Level Biology🙋🏾♂️
rai francisco no one
Just finished A level biology this year, and we did do it 👆
Shahmeer Hamid oh, I didn't know they taught it at a lvl biology. also how hard is a level biology your opinion
Dihybrid crosses hahahaha
We had to do it for A level geography too 😂
How did you get the expected data?
I gotta take my biostats midterm in, like, 5 minutes. Now I finally understand χ^2 tests 😂😂
I still don't understand what exactly expected data is? Is it just what people expect to happen, or is it data based on previously carried out research?
BS psychology student here 😊🙋
Good video, but I could do without the annoying sound effects. It can distract from the explanation for some individuals.
Can you guys make an advanced statistics?
Math is challenging T_T
It is for me because it processes in a conscience part of my brain. I have to do it the long way out on paper every time. The few people that can beat a classroom of people with calculators is because they process math in the SUB conscience part of their brain. So, if you're not good at math don't feel bad. You're probably good at language :D
I have always preferred doing the workings out on paper because it's easier for me to handle the information that way. I study Engineering lol.
Don't be discouraged! You make fewer mistakes when you write it all out, and it's people like us that get better marks.
Also, in real world maths, mental maths isn't that important. Handling complex equations on paper/computer is infinitely easier/more reliable.
Nice. Very helpful. This is exactly the statistical model I'm working with in my thesis.
*Fail to Reject* may not have been the best words to use. (without an explanation )
Could you do accounting or business?
Or crash course american politics?
ACCOUNTING YES PLEASE
I listened to this whole video but I didnt hear anything after the first test... wtf
corona ke ghayenge hoi? Mer pekashukti goki lema?
Koi?
Yay 1000th video of the CC series
It's so hard to follow these videos. She talks so fast and I can't follow.
Try 0.75x playback speed.
Melakai ur pekshamtu? Lokei yakam chupki he?
HAPPY FESTIVUS.
Thank you so much.. Helped me understand chi sq test.
So neatly organized too T^T thank you
League of Lemurs...it better win game of the year awared
Hundreds of unique lemurs.
D
huh?
👌👍