Naive Bayes, Clearly Explained!!!

When most people want to learn about Naive Bayes, they want to learn about the Multinomial Naive Bayes Classifier - which sounds really fancy, but is actually quite simple. This video walks you through it one step at a time and by the end, you'll no longer be naive about Naive Bayes!!!
Get the StatQuest Study Guide here: statquest.org/statquest-store/
For a complete index of all the StatQuest videos, check out:
statquest.org/video-index/
If you'd like to support StatQuest, please consider...
Buying my book, The StatQuest Illustrated Guide to Machine Learning:
PDF - statquest.gumroad.com/l/wvtmc
Paperback - www.amazon.com/dp/B09ZCKR4H6
Kindle eBook - www.amazon.com/dp/B09ZG79HXC
Patreon: / statquest
...or...
KZbin Membership: / @statquest
...a cool StatQuest t-shirt or sweatshirt:
shop.spreadshirt.com/statques...
...buying one or two of my songs (or go large and get a whole album!)
joshuastarmer.bandcamp.com/
...or just donating to StatQuest!
www.paypal.me/statquest
Lastly, if you want to keep up with me as I research and create new StatQuests, follow me on twitter:
/ joshuastarmer
0:00 Awesome song and introduction
1:08 Histograms and conditional probabilities
4:22 Classifying "Dear Friend"
7:33 Review of concepts
9:00 Classifying "Lunch Money x 5"
10:54 Pseudocounts
12:35 Why Naive Bayes is Naive
#statquest #naivebayes

[@statquest]

NOTE: This StatQuest is sponsored by JADBIO. Just Add Data, and their automatic machine learning algorithms will do all of the work for you. For more details, see: bit.ly/3bxtheb BAM! Support StatQuest by buying my book The StatQuest Illustrated Guide to Machine Learning or a Study Guide or Merch!!! statquest.org/statquest-store/

[@venkatasubramaniangopalakr7880]

Your videos are one of the best out there in the market in KZbin. Your explain such complicated technological concepts in very simplified terms that a layman can understand. Thank you for taking the efforts and time to teach ML and stats. You deserve an award! :-)

[@JamesJon1187]

Bam!!

[@TheProblembaer2]

Simple and short: THANK YOU JOSH STARMER YOU ARE AWESOME.

[@zhichensong986]

Honestly Josh, I feel like you could teach machine learning to a 5yr old. This is amazing content, thank you.

[@statquest]

BAM! :)

[@aminkvh7]

@@statquest we will have an MLQuest on youtube kids in 2 months :)

[@mustapham6890]

@@statquest I just like it when you say the word , hahaha . Thank you really for making this looks simple :)

[@Arjun147gtk]

Sometimes I feel that I am watching oswald and then they start teaching the theory.

[@muhammad0104]

... 😅

[@hanadibinmujalli965]

we are lucky that you decided to create this channel & teach us ML in very clear & entertaining way!!

[@statquest]

Thank you!

[@jiunyen5586]

The second I saw that we're gonna talking about spam, I waited for you to say "SPAAAAMMMM" like a 5 yo child. And you deliver as always! Thank you!

[@statquest]

Hooray! :)

[@arnoyang4017]

This tutorial is actually better than my college lecture, paid $$$ for a paper of degree, sucks

[@statquest]

Bam!

[@VRENDesi]

So u paid

[@62294838]

This is just soo amazing. I did spend quite a long time reading the lecture notes of other universities online but never get to understand it as thorough as this. Soo good thank youu!!

[@statquest]

Glad it was helpful!

[@jeremyhofmann7034]

I subscribed immediately after “beep boop beep boop”. Honestly this may help me find a love for statistics after a bad college education experience with it in the 90’s.

[@statquest]

Bam!

[@venkatasubramaniangopalakr7880]

Your videos are one of the best out there in the market on KZbin. You explain such complicated technological concepts in very simplified terms that a layman can understand. Thank you for taking the efforts and time to teach ML and stats. You deserve an award! :-)

[@statquest]

Wow, thanks!

[@moindalvs]

Prabhakarna Sripalawardhana Atapattu Jayasuriya Laxmansriramkrishna Shivavenkata Rajasekara Sriniwasana Trichipalli Yekya Parampeel Parambatur Chinnaswami Muthuswami Venugopal Iyer

[@ritikvaidande4683]

@@moindalvs Did you noted it down while watching that movie?

[@rah651]

@@moindalvs 😂😂

[@54mjaime]

The brilliance of StatQuest is how the use of prosody and cartoonish visuals can tap into my "child" brain which in turn allows me to stay focused, entertained, and makes these concepts seem so simple. Genius!

[@statquest]

Hooray! :)

[@danverzhao9912]

This is what I call quality teaching, stuff that I expect from unis that are offering online lectures because of covid, with nice animation and thoughtful explanation, not just lecturer talking in the lecture hall but recorded like usual improvising.

[@statquest]

Wow, thank you!

[@Laura-jl7vc]

best channel I could have find in the last month. Thank you so much. I'm doing my master thesis in machine learning and I've never done anything with it before, and this is helping me so much

[@statquest]

I'm glad to hear that my channel is helpful! :)

[@maitekolarik]

I love your explanations and humor. Thanks a lot for making complex things so much easier.

[@statquest]

Glad you like them!

[@tymothylim6550]

Thank you Josh for this video! It gave me a great and clear understanding of the Naive Bayes Classifier, as well as a good workaround the '0 probability' problem by using alpha!

[@statquest]

Glad it was helpful!

[@alepel792]

Amazing teaching abilities. This is now a complimentary source for my machine learning course - thank you!

[@statquest]

Bam!

[@Vivaswaan.]

What you teach is very helpful, but how you teach is what makes you the best. What a beautiful way of teaching! comprehensive explanation and all the creative lines/ wit you put here and there.

[@statquest]

Wow, thank you!

[@albert_chen]

I just stared machine learning and your songs just bring a smile to my face.

[@statquest]

Hooray! :)

[@sruthiparvatha8790]

Thank you so much for this great explanation. You're an awesome teacher, keep up the great content. Can't wait to see more :)

[@statquest]

Thank you! :)

[@christopherreif3624]

You are the reason why I'm getting through my graduate level statistical courses. I'm glad I had found you!

[@statquest]

Good luck!!! :)

[@nastarankianersi104]

Oh my God learning has never been more fun. And when you say clearly explained you mean we can understand both the words and the meaning so thank you! :D

[@statquest]

Thank you! 😃

[@naveenkalhan95]

after seeing this video I feel like there are only 1503 (total views) people in the world who know what Naive Bayes truly means!!! plus Josh Starmer included ... thank you for your great work

[@statquest]

BAM! :)

[@lakshman587]

Now 258,429(total views) people in the world who knows what Naive Bayes truly means!!!! BAM!!!!! Including me!!! 😎😎😎😎😎😎😎

[@petercourt]

Wonderfully clear and helpful, thanks for all your hard work making this Josh! :D

[@statquest]

Glad you enjoyed it!

[@prof.angelinagokhale6004]

Thank you Josh for this wonderful explanation. It will give me a head start into understanding the mathematical-statistical underpinnings of the algorithm. I am going to strongly recommend your tutorials to my students!

[@statquest]

Thank you!

[@josevillalobos547]

I hope one day I get lucky enough to have a research advisor or mentor of any kind like yourself. All your videos are worth gold. Thanks for the all the time you put in to us.

[@statquest]

Wow, thank you!

[@tanyaneeraj8798]

well, I have an exam tomorrow, and I am binge watching statquest videos and loving the songs and the animated explanation. who says higher-level things need to be boring. Thank you statquest. BAM!

[@statquest]

Good luck with your exam! I hope it goes well. :)

[@marvhartigan3677]

@@statquest BAM! you forgot it, so i did the needful (:

[@antoniosalomao6634]

The world needs more videos like these, thank you Josh!

[@statquest]

Thanks!

[@gustavshochat7792]

My "DOUBLE BAM!" senses started tingling around 12:25 but were abruptly quashed by your "SPAM!" sneak attack. So very grateful for the information you provide and the methods by which you deliver.

[@statquest]

Thank you very much! :)

[@ahmed-abubakar]

Honestly the best way to learn to Machine Learning and stats - THANK YOU you made my DAY!

[@statquest]

Thank you very much!

[@footballistaedit25]

The way you present each topics is amazing. Thank you so much, Sir

[@statquest]

Thanks!

[@thequeenofspades]

I swear to god authors go out of their way to explain topics like this in the most complicated way possible. I reread the section on naive bayes in my textbook many times, and didn't understand it. Josh made it crystal clear in under fifteen minutes.

[@statquest]

bam!

[@toituxu749]

When you explain something complicated to everybody and even a 5-year old kid can understand, you BAM DAM genius Thanks DAM much!!

[@statquest]

Thank you! :)

[@koreanbroadcastarchive306]

Josh, you are the greatest thing that happened to me in 2021. Thank you for the walkthrough.

[@statquest]

Thanks so much! :)

[@yudhaken2095]

All of your tutorials will really help me in making my final project, and I just want to say thank you very much.

[@statquest]

Glad I could help!

[@sudarshanbandyopadhyay9052]

Such nice explanation of the concept, from now onward will follow this channel to learn more stats and probability concepts.

[@statquest]

Hooray! :)

[@jennytamboli5740]

This was so so so so so sooooooooo amazingg!!!!! I have my oral exam tomorrow and your explanation worked like a charm!! Thank you so so much Josh for creating such a video with crystal clear explanation. It is NOT BORING at all rather very interesting and kept me hooked till the end of the video!! :) Bam Bam Bammm!!!!!

[@statquest]

Hooray! And good luck with your exam. Let me know how it goes!

[@VideamRaveeni]

maaaaaaaaaaan ! I had been stuck on this topic for a MONTH trying to get the hell out of it... you just cleared everything in 15 MINUTES! You are an absolute HERO.

[@statquest]

Glad it helped!

[@mbrz1970]

Your videos are awesome. Definitely one of the best teachers here on KZbin. Thank you for making such great content for us.

[@statquest]

Glad you like them!

[@akshatshrivastava4524]

I am so lucky , I found this channel, at very start of my Data Science Journey. Thanks Josh. Psst - I am gonna buy your study guides. Hope that is the least I can do to support your effort :-)

[@statquest]

Thank you very much! :)

[@muhtasimbari8951]

Why can't my professors be half as good as you in explaining this stuff? I owe you my project marks StatQuest!

[@statquest]

Thanks!

[@Divinemadness2]

I normally get a bit annoyed with sponsorships in videos and/or self-plugs for other videos, but you are one channel where I have 0 problem with it. You put out such an amazing product and clearly care so much about the viewers that you can get away with anything haha. Great job on this video! Beautifully explained.

[@statquest]

Awesome! Thank you!

[@flavienrobert2516]

I ve been watching many videos about naive bayes but...as usual, Statquest is by far the best. Congratulations !

[@statquest]

Thank you!

[@jakestbu8692]

I've learnt a few ML algorithms, and this was the first one that I learnt with StatQuest. It was definitely the easiest.

[@statquest]

bam!

[@dec13666]

You know when the author of the video cares about their viewers, when you see him replying *every single comment* on this section

[@statquest]

Ha! Yes, I care a lot about the viewers, and I hope that it shows in the videos themselves too.

[@dec13666]

@@statquest Thanks about it! Keep it up with the good work! 😎✌️

[@erniec.2088]

double bam!

[@huakun]

Thank You so much. If I saw this video earlier it could save me so much time. I took machine learning courses several months ago and the concepts and terminologies were so confusing. I hope more videos like this are made in the future. Thank you again.

[@statquest]

Thank you very much! :)

[@shubhamsarin2263]

Your videos are the best thing to have happened during this lock-down (I've lost my job and trying to utilize this time to learn more and more). Thank u so much.

[@statquest]

Thank you! And I hope you find a new job soon. :)

[@abhishekm4996]

I enjoyed it and learnt....Even a kid can clearly understand your video provided the basic probability stuff taught in his/her school...

[@statquest]

Thanks! :)

[@ianscottuk]

you are genuinely getting me through a masters....

[@statquest]

Good luck! :)

[@sreedharreddy472]

Simple and clear Explanation Sir. I just Enjoy watching your tutorials and learning. The way you explain makes complicated stuff so simple. My respect and humble gratitude to you Sir 🙂 Thank you for your teaching. Keep teaching and keep inspiring many.

[@statquest]

Thank you very much! :)

[@donharris8846]

You Sir, are the King of explaining machine learning concepts. Many thanks!

[@statquest]

Wow, thanks!

[@nicolascortegosovissio2824]

Great and funny explanation! Just love the terminology alerts: "Oh nooooo", keep going please!

[@statquest]

Thanks, will do!

[@AOLFlyersNewsletters]

Josh - this was so good! Awesome job. I went to your site to see Study Guides. Do you have package price? That way we get all. And maybe in future come up with a visual study book focussed on ML topics.

[@statquest]

I don't have a package deal price yet since I keep adding new Guides every two or three weeks. However, once I have a full set, I'll come up with a package price.

[@YYchen713]

Can only be so clear if the presenter has a profound understanding and thoughts about the topic! Superb!

[@statquest]

Thanks!

[@samirkhan6195]

You are my favorite Teacher since i can watch you even when my mind full of stress.

[@statquest]

Hooray! :)

[@jessicafb5398]

When it says "shameless self promotion" the thought didn't even cross my mind of it being self-promotion, more like "helpful to the viewer" :)

[@statquest]

Thank you! :)

[@pabloruiz5407]

I actually laughed out loud at 12:29 😂 Amazing videos, thank you so much!

[@statquest]

Glad you enjoyed it!

[@velunatarajan2649]

Deep information with a simple learning approach. Thank you, Josh !!

[@statquest]

Glad it was helpful!

[@monishajayanmoni4135]

I went through 2 tutorials but never understood naive bayes clearly. But after seeing ur video I understood it clearly. Thanku so much!

[@statquest]

Hooray! I'm glad the video was helpful. :)

[@edmundchan8923]

Simple and clear! Like it!

[@statquest]

Thank you! :)

[@kiranchowdary8100]

I didn't expect that spammm at 12:33 instead of bam I am like literally baaammm

[@statquest]

Bam! :)

[@ninhdang1106]

I love the videos! It's like ELI5 of Machine Learning. It really helps me a lot since I'm struggling with the course in university

[@statquest]

Thank you!

[@wew6438]

the level of your understanding is astonishing, our children in the future will thank you for your work.

[@statquest]

Wow, thank you!

[@abdosoliman]

dude, you should never ever stop making videos 😂😂😂

[@statquest]

Thanks! :)

[@carlosalexramossouza7439]

I don´t know why someone can deslike a great video like that. I say great because it is very well explained and very well produced.

[@statquest]

Thank you very much!!! :)

[@nathankomer8699]

Great introduction, awesome visualization, and some extra BAM! Thank you so much for your hard and very entertaining work!

[@statquest]

Glad you enjoyed it!

[@ricardogomes9528]

The take on Probabilities vs Likelihood was your hero moment for me. I haven't seen such a crystal clear explanation long time. Thks!

[@statquest]

Thank you!

[@zahiyoussef2551]

Baaaaaaam i've just discovered that i still a kid , and i feel happy when you explaine with this BAAAAAM thing , it works broo hhhhhhhhhhh.

[@statquest]

bam!

[@Loachie90]

Just when you expect Bam, you get Spam...

[@statquest]

;)

[@nzerusocia9232]

I wish our education system helped us learn the way you teach. I am so thankful to have stumbled upon your channel in this perilous journey of machine learning algos

[@statquest]

Thanks!

[@chandanmishra308]

BAM! finally understood this topic. I can't thank you enough. You were such a big help! You are real gold and this channel a gold mine.

[@statquest]

Thank you! :)

[@TheCJD89]

Not sure why you say "oh no" before a Terminology Alert. They are usually quite helpful :)

[@statquest]

Thanks! :)

[@samarthmehrotra2204]

It is a slight offtrack from the main narrative. So shouting out loud terminology alert makes the viewers (me atleast) mindful that this is kind of a side note.

[@franciscoaragao5398]

“Oh no” is not about terminology alerts. It is about terminology. There are a difference

[@imshafay]

Your number1 fan here XOXO

[@statquest]

Thanks! :)

[@subhasreegupta8669]

Being a Data Science aspirant and having zero knowledge in stat(bcz I m from a tech background), you save me in the middle of the ocean. I owe you everything I learnt till now in statistics. I dont know how to thank you.....Thanks a lot and keep making awesome videos for us...

[@statquest]

Thanks!

[@hyeongsoo-nim719]

From South Korea, Im really appreciated your dedication for the work. I have been struggling with understanding it, but its completely understandable .

[@statquest]

Bam! :)

[@ezp721]

Oh No!! Privacy alert!! ...since the algorithm needs to read the email to detect spam hahaha. Thanks Josh, great explanation!

[@statquest]

Nice one! :)

[@masthanjinostra2981]

Suitable one?

[@shubhamlahan]

Josh is a Godsend for noobs like me. Why Google it when we've got StatQuest! Please accept my BAM, milord.

[@statquest]

BAM! :)

[@BrunoAraujo-po2lm]

OH MY GOD! Best explanation I've seen so far! I MUST see the other videos! Got one more subscriber man, thank your so much for your work!

[@statquest]

Hooray!!! Thank you very much!

[@GamerBat3112]

The 45 dislikes are from the Nigerian Prince!

[@statquest]

Awesome! :)

[@masthanjinostra2981]

Don’t troll

[@AshaiiOokami]

Was expecting a fullblown BAM! at 12:32 and then the SPAM! caught me off guard, it was perfect, now I gotta update my own prior about your BAMs! Thank you, you beautiful man, for the best ml explanations ❤

[@statquest]

Awesome! :)

[@hamedgholami261]

I love the way you teach things! thanks for being this much helpful.

[@statquest]

Happy to hear that!

[@alecvan7143]

Amazing video as per usual Josh, wow ! Loving the sections of the video by the way :)

[@statquest]

Thanks! KZbin just rolled out the "chapters" feature, so I'm adding them to my videos when I have time.

[@kalakannan4247]

Hi Josh, You are the best teacher I have ever seen. I always enjoyed your stat quest videos and I enjoy your book as well. What a pleasure to learn from you

[@statquest]

Thanks!

[@user-ff7lg7md9s]

Man, You are surely talented! Voice is so good that it was just perfect for me to understand the content. Thank you.

[@statquest]

Wow, thanks!

[@madhuvarun2790]

I just learned Bayes classifier thanks to you. Keep up the amazing work.

[@statquest]

Thanks, will do!

[@samsonmak3272]

We appreciate your time and effort into explain ML to us. Best wishes!!!

[@statquest]

Thank you!

[@ashishagrawal4906]

This is the first tutorial related to Machine Learning I found that is actually clear :)

[@statquest]

Thank you! :)

[@tenmins9355]

I love your videos, thank you for making ML easier for students all over the world!!!

[@statquest]

Glad you like them!

[@allyourcode]

I never thought I would be laughing my head off at a stats lecture. You are truly gifted and a gift to this world. Wow.

[@statquest]

Thank you! :)

[@judemungcal1131]

Just about to have my thesis defense, i was planning to use Naive Bayes in my modelling and really didnt understand it. Now this video might be the biggest help for my defense, THANK YOU!!!

[@statquest]

Thanks!

[@znikerizm]

3 years on, and this video is still super helpful, thank you Josh! :)

[@statquest]

Thanks!

[@jones4540]

Josh, thank you very much 2 days I could not understand about Naive Bayes, thanks to You I figure out how it works

[@statquest]

bam!

[@_zeppeh]

god this video is honestly one of the best videos that I saw in the recent time. Such a joy to watch!

[@statquest]

Thank you!

[@DaveGogerly]

Hi Josh, I bought some of your study guides today, they are the icing to the cake, well done they are really good and look very cool too!

[@statquest]

Wow! Thank you very much!!! I really appreciate your support! BAM! :)

[@DaveGogerly]

@@statquest Bam bam support, I wish the rest would support you, you should be a millionaire 🎉🎉🎉🎉😊😊😊

[@statquest]

@@DaveGogerly Thanks!

[@gavinr1425]

We are all fortunate that this channel is free

[@statquest]

Thanks!

[@jacobkanyi5046]

Why am I finding this a week before exam. This video was easy to understand. Thank you! Triple BAM!!!😂

[@statquest]

Thanks!

[@varunjindal1520]

This is an awesome explanation. I first did some match from Prof. Andrew course and then this, and this made it completely clear.

[@statquest]

Glad it helped!

[@Samuel-wl4fw]

Very impressive explanation, I love videos that make me enjoy learning, especially topics I have on exams :D

[@statquest]

Thank you! :)

[@ccuny1]

Great treatment of Naive Bayes for people like me. Thank you Josh.

[@statquest]

Thanks! :)

[@ruheenqureshi]

Your videos are really helpful, easy to understand. I searched for how to use adaboost and now I'm binge watching all your videos😂

[@statquest]

BAM!!! :)

[@PRSHNTTKMR]

That is an awesome clear and simple explanation worth a big thumbs up 👍👍

[@statquest]

Hooray! :)

[@danlufu2310]

This video answers all my questions! This is indeed clearly explained!

[@statquest]

BAM! :)

[@adiflorense1477]

7:31 DOUBLE BAM!!! .cool explanation sir.. i just understood term prior probability after seeing this

[@statquest]

Bam! :)