Chi-Square Tests: Crash Course Statistics #29

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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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Опубликовано:

28 авг 2018

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Комментарии : 163

@BobSmith-pl6sm 4 года назад

Idk why this is so difficult. The math isn't hard, it's just the process and logic that really messes with my brain 😭

@amansamad5172 4 года назад

Bro i feel even dumber after this video wtf

@annasimone7780 4 года назад

same, bro

@JBX07 4 года назад

I didn't get it either and not getting it made me sad.

@graceyudha 4 года назад

same here

@PranavViswanathan 6 лет назад

Every AP Bio student quaking

@carsonchiem145 6 лет назад

FACTS

@kenxiong9856 5 лет назад

IB :)

@pantasticlaire3966 5 лет назад

IB bio hère, haven’t done this in quite a bit and paper three is in two hours ish

@Kaseus-lq7cj 5 лет назад

A2 stud here XD

@Noncyclic 4 года назад

YES OML

@shaaaaaalalalaaaaaa 4 года назад

Bro i guess i should just stick to biology crash course. This one flew right of my head

@gaxperson3258 6 лет назад

This is CrashCourse's 1000th video.

@mX-vx9kc 6 лет назад

Is it? I wonder..

@Aa.oeti59 5 лет назад

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.

@nawakalima2410 4 года назад

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)

@dandanthedandan7558 5 лет назад

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.

@Psd863 6 лет назад

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!

@marrane87 5 лет назад

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!

@chizpa305 6 лет назад

Today I was precisely looking for a Chi square video explanation and I found this video (uploaded yesterday). We're entuned.

@learnlearn8230 4 года назад

Very well explained. thanks for an amazing contribution. Things are really well related and narrated.

@blunteddful 6 лет назад

Nice. Very helpful. This is exactly the statistical model I'm working with in my thesis.

@benderbendingrofriguez3300 5 лет назад

who else would like the League of Lemur to be a real game?

@emeraldemperor2601 4 года назад

YASSSS

@financeataglance8840 6 лет назад

Another excellent video! Very well explained on a concept that is difficult for many students. The Chi Square test is used in finance too!

@sonja9120 5 лет назад

Thanks Adriene, you are a lifesaver!

@XxxFoxionzxxX 5 лет назад

This was fantastic. Great work.

@Lime-rr6te 5 лет назад

this video was very helpful and easy to understand, thank you

@tedgrove9412 11 месяцев назад

This is an amazing explanation! Well done!

@Levy957 6 лет назад

My favorite statistics series

@qqq_Peace 5 лет назад

Brilliant video, thanks!

@perseusgeorgiadis7821 2 года назад

I gotta take my biostats midterm in, like, 5 minutes. Now I finally understand χ^2 tests 😂😂

@ruijietey4014 6 лет назад

I wanna be a fighter lemur

@Heavy2deep 6 лет назад

Always a pleasure

@ImaginaryEvil 2 года назад

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

@audreyxiao6607 4 года назад

Love this!

@kayak0000 5 лет назад

Ayayay! Box and whiskers plot at the back! *heart*

@leoniduvarov6565 5 лет назад

great video

@sidzilpe9391 6 лет назад

Yay 1000th video of the CC series

@bjarbj944 4 года назад

Best video ever

@ognjenjosifov126 3 месяца назад

Thank you again ❤❤❤❤ ❤

@user-nz7jh8gf3b Год назад

Thank you so much.. Helped me understand chi sq test. So neatly organized too T^T thank you

@MartaniPanganSehat 3 месяца назад

Thankyou.

@fatihataheya2718 6 лет назад

ANOVA and regression next pls

@aaronmarks9366 5 лет назад

My favorite statistics documentary series is PBS ANOVA

@EmmaToku 4 года назад

How did you get the expected data?

@aimeegardner9736 4 года назад

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?

@BantamJJ 6 лет назад

where can I download this lemurs games pls

@Shermaine2009 4 года назад

Can I get a link to download League of Lemurs after I’m done with my dissertation? 🥺🥺🥺

@luiza1321 Год назад

I skipped ahead when I saw the league of lemurs bc I thought it was an ad lol

@jeronimotamayolopera4834 5 лет назад

HAPPY FESTIVUS.

@garagelifestyle 4 года назад

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.

@EricaFioriGentry 5 лет назад

This was is helpful!!!! Thank you so much!

@Johnjo85 6 лет назад

League of Lemurs, nice parody of HotS and DotA. ^_^

@TheDezz91 5 лет назад

Kappa

@pawtleopard 6 лет назад

Can you guys make an advanced statistics?

@kyrag4295 4 года назад

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!

@preetidipajena6766 10 месяцев назад

Why in chi square expected frequency for every cell is greater than 5?

@TalysAlankil 6 лет назад

I'd play the hell out of League of Lemurs

@k1nj3 6 лет назад

Damn so useful

@cirusMEDIA 4 года назад

*Fail to Reject* may not have been the best words to use. (without an explanation )

@hek4036 4 года назад

@ 9:28 i dont get 1.6 . Shouldnt it be 3.4?

@Edgelordess 6 лет назад

Leauge of Lemurs lol! XD What class do I choose if I wanna be a spell caster?

@kenxiong9856 5 лет назад

wouldn't be healer

@Optimistas777 5 лет назад

woudn't be a tank too

@juliannaokike31 6 лет назад

We know what time it is and where we stand don't we.

@dylanhritchuk2829 6 лет назад

Where was this video when I took Quantitative Methods last semester 😑

@TimberWulfIsHere 4 года назад

you just do quatitative? bruh... my unit has both quantitiative and qualitative methodologies to study....

@lidabaynes600 4 года назад

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!

@mesplin3 6 лет назад

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?

@y__h 6 лет назад

Oh you meant Bayesians vs Frequentists? It's basically kinda like Mathematicians vs Physicists, or Pi vs Tau.

@mesplin3 6 лет назад

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?

@OlleLindestad 5 лет назад

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.

@KazuichiSoda. Год назад

Now I want to play League of Lemurs XD

@AyushSingh-mv8sp 5 лет назад

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?

@CautionCU 6 лет назад

2:30 League of Lemurs!!!!

@milkwithanime 4 года назад

where can I play League of Lemurs? Asking for a friend ...

@Voidsworn 6 лет назад

Hundreds of unique lemurs.

@kevinlu2155 Год назад

League of Lemurs...it better win game of the year awared

@user-zk3mz9oy5z 5 лет назад

Why chi-square distribution looks like that weird shape??

@jacoboribilik3253 4 года назад

There is not a reason behind its shape. It is just the way it looks like.

@ainmartinez8186 4 года назад

BS psychology student here 😊🙋

@Jinx-il9jo 5 лет назад

Slytherin and I love pineapple on pizza

@alex_9504 6 лет назад

Could you do accounting or business?

@Edgelordess 6 лет назад

Or crash course american politics?

@janetgarcia6143 5 лет назад

ACCOUNTING YES PLEASE

@raiwood77 6 лет назад

Who does this in A Level Biology🙋🏾‍♂️

@yuno9121 6 лет назад

rai francisco no one

@iRiShKnIcKs2011 6 лет назад

Just finished A level biology this year, and we did do it 👆

@yuno9121 6 лет назад

Shahmeer Hamid oh, I didn't know they taught it at a lvl biology. also how hard is a level biology your opinion

@khbye2411 6 лет назад

Dihybrid crosses hahahaha

@cboaitey99 5 лет назад

We had to do it for A level geography too 😂

@jestbraine4076 4 года назад

@Curry_Ramen 5 лет назад

How did you get P as 0.3 I didn't get it

@XxxFoxionzxxX 5 лет назад

EnigmaticSkygazer check the value of chi squared (3.9) and look on tables with df=3

@SyMpHOny893 4 года назад

I listened to this whole video but I didnt hear anything after the first test... wtf

@sudeepjoseph69 4 года назад

corona ke ghayenge hoi? Mer pekashukti goki lema? Koi?

@BRANDONYERMASH 6 лет назад

Zenilman AP Bio!

@carsonchiem145 6 лет назад

lmao

@unleashingpotential-psycho9433 6 лет назад

Math is challenging T_T

@maximvsdread1610 6 лет назад

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

@stephaniesmith3544 5 лет назад

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.

@ViragHegyi-bs2ge 2 месяца назад

I was with her pretty much the whole way but then right around minute 9, she completely lost me... Aaaaaaahh!! :(

@grainfrizz 6 лет назад

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)

@ScarrVett 5 лет назад

Haaahahahha League of Lemurs hahahahha

@owenmarks2060 5 лет назад

huh?

@juliannaokike31 6 лет назад

No more Maggie

@ianwells7309 6 лет назад

@nagoyaboya 5 лет назад

Good video, but I could do without the annoying sound effects. It can distract from the explanation for some individuals.

@MW-bk2nc 4 года назад

she has nice eyes

@ianwells7309 6 лет назад

@yuno9121 6 лет назад

bye

@rosschad8448 5 лет назад

Who else can only think of John Green when the intro music plays?

@carrymeorgg8512 4 года назад

League of Lemurs made me want to play league of legends instead of studying. Guess I'll watch the video tomorrow xD

@CatCamryn 5 лет назад

Damn no McNemar’s Test huh?

@sudeepjoseph69 4 года назад

Chukte lamakshuk fama lo ki he? Ram chuckte luky tomchik ki he?

@CatCamryn 4 года назад

@@sudeepjoseph69 What?? Idk the language you're speaking dude.

@sudeepjoseph69 4 года назад

@@CatCamryn HAHAHA. Loke gayinga! Mer chuckte ki he lo! HAHAHA

@CatCamryn 4 года назад

@@sudeepjoseph69 ah yes loke gayinga indeed.

@X360CURLX 6 лет назад

999th videooooo

@ajaydeshmukh4241 4 года назад

👌👍

@JulieBall-dg2ci 6 месяцев назад

The graphics are so distracting.

@AVEdrums 6 лет назад

This came to late, had my exam on monday

@yuno9121 6 лет назад

AVE drums lol what exam

@mikkelmller-srensen3727 4 года назад

only more confused.. this makes no sense..

@yuno9121 6 лет назад

*league of lemurs!!*

@AmirGTR 5 лет назад

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 🤷🏻‍♂️

@jeffreyosiwalajr3161 5 лет назад

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.

@Mist_R 4 года назад

league of lemurs LMAO

@dannyg1056 5 лет назад

Too fast. Edited to take out the pauses for thought. I need those pauses. Not stop chatter is too mind boggling. Thank you, anyways.

@TadanoCandy 5 лет назад

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.

@juliannaokike31 6 лет назад

Once someone do me dirty you not coming back from that.