Video 5: Dummy Variables

Рет қаралды 235,272

Күн бұрын

This video discusses what are dummy variables, how do we construct them, and how do we interpret their coefficients in a multiple or multivariate linear regression.
TABLE OF CONTENTS:
00:00 Introduction
00:10 Continuous vs. Categorical Variables
01:48 The Problem with Categorical Variables
02:52 Dummy Variables: Representing Categories
03:48 Data for Example: Professors’ Salaries
05:27 Exploring the Data
08:48 Representing Two Categories: Qualification
09:39 Data Table with Professional Dummy
10:02 Regressing Salary on Qualification
11:50 Comparing Salaries by Qualification
13:02 Qualification Regression Result
13:44 Interpreting the Coefficients for Qualification
14:45 More than Two Categories: Rank
15:43 Regressing Salary on Ranks
17:52 Data Table with Rank Dummies
18:19 Rank Regression Result
18:48 Interpreting the Coefficients for Qualification
21:14 Rank Regression Result (excluding assistant)
22:45 How do we interpret these?

Пікірлер: 158

@cedq4957 4 жыл бұрын

Man, it is really worrying to me that a 20 minute video taught me a lot more than 3 hours in class with our professor...I feel like so much money is spend for nothing in the academic world

@MrSpiritmonger 2 жыл бұрын

school is to weed out people who can follow instructions and good memory. KZfaq can sometimes teach you A LOT more than school. (I have a PhD and two masters and undergrad from top 10 university)

@yiminshi5362 2 жыл бұрын

@@MrSpiritmonger My god, this video answered all my questions that I couldn't figure out by watching our professors video over and over again.

@eone3102 9 ай бұрын

How are you sure it is your professor and not your will power, focus and attention that made the difference.

@NoraShi-di2dr 21 күн бұрын

9 years later your video is still giving tremendous help to students, thank you for your work.

@Skritsky 3 жыл бұрын

This series of videos seems to be the best of its kind. Thank you!

@larrylaw3693 6 жыл бұрын

Can't thank you enough prof! Really simple yet elaborated explanation! :)

@Hans-pc1vc 7 жыл бұрын

Best video I have encountered on this topic. Thank you!

@Hari-cz3od 6 жыл бұрын

Such an art of teaching! Grateful to your video that saves me in both Econometrics and Data Science graduate classes. The series should be introduced to much more learners! Thank you so much!

@sitinurhidayusharin1892 4 жыл бұрын

The explanation on each detail really make me understood this topic even better. Every examples and detail really give the clear picture of this topic.

@rasyimahramli5b125 4 жыл бұрын

I glad that I watch this video. The explanation really great, compact yet concise. As a university student its easy for me to understand the content. Thank you so much for your great work.

@mehrzadbaktashbaktash2559 6 жыл бұрын

The best video I have ever watched about the dummy variables! Thanks a world!

@nurasyikinsharif3387 4 жыл бұрын

This video is so great! Before, I only understood this topic on the surface, after watching this, I now know how to further interpret the dummy variable better. This video also helped as reference for my assignments!

@najihaazhar8634 4 жыл бұрын

The explaination about the dummy variable as you have explained using more than one examples is really helpful. I manage to undertand the dummy variables rather than before.

@eveo2223 5 жыл бұрын

Simple and concise, easy to understand! Thank you!

@josvandeneynde5849 Жыл бұрын

Nice and well explained video. Saved me a lot of time going through old text books where intuition about these concepts is often much more difficult to get. Keep up the good work dataminingcae!

@sitinuraisyahmohdhawari9295 4 жыл бұрын

The examples used in this video are easy to understand, plus with your interesting way of explanation. I am glad that this video exist. Thank you for this great video.

@AmitSingh-pe2xw 2 жыл бұрын

This is one of the best explanation for dummy variable. Thank you so much for your help and kindness. You are the best professor

@dianaelysha4524 4 жыл бұрын

Explanation using some example are exactly the way to make me more understand 😍Now I'm getting better in understanding dummy variables. Good job 👍🏻

@yiakhangpaxang8086 3 жыл бұрын

This is the greatest explaination. Thank you so much for your help and kindness. You are the best professor

@tald747 3 жыл бұрын

An excellent explanation of this subject covering all aspects! Thanks.

@akkshaichand6555 3 жыл бұрын

Thank you so much for this! You made the concepts easy to understand.

@haziqahabdhamid8194 4 жыл бұрын

The explanation is precise and great. It make me more understand about dummy variables. Thank you so much for this great work.

@shafeqahsaifullizan5a601 4 жыл бұрын

From the video i understand how to interpret the two categories. Also the problems of variables. Thank you so much for this knowledge. 👍

@chanle5989 6 жыл бұрын

Thank you so much! I really needed this for my thesis!

@fatinaliah7287 4 жыл бұрын

The explanation with example really help me to understand more on this chapters. Thank you

@kaushikbhadresha 3 жыл бұрын

Simple, crisp and made is very easy to understand. Thanks

@Mgilsy 8 жыл бұрын

Wauw! This video is absolutely great. Good job!

@ds68889 6 жыл бұрын

your teaching is so clear, thanks a lot!

@anatimahmud3823 4 жыл бұрын

the example you give makes me more understanding about the dummy, especially on how to use it and interpret it. During this pandemic, your video is very suitable for us students to learn about the dummy variables.

@E.Khan04 5 жыл бұрын

Amazing, awesome, fantastic.... are very small words for your videos..... I just love you!

@nurulisfahani108 4 жыл бұрын

From the video, now I know much better and understand how to interpret coefficients in regression analysis. The explanation is very well to understand by using graphics. Thank you sharing the input.

@noorshahirasamsudin5713 4 жыл бұрын

I think i more understand about this topic thanks to your good explanations. Its very interesting and not boring at all.

@nurulainnadhirah4379 4 жыл бұрын

The concept of dummy variables was very clearly explained. As a student, it's easy for me to understand the content after I watch this video. Thank you so much for helping me.

@ShivamGupta-yl4ir 5 жыл бұрын

Best video ever seen on this topic..

@anisasyhikeen5448 4 жыл бұрын

I found an easy way to interpret the coefficient when we have more than two categories. This video helps me a lot on understanding about dummy variables.

@somcana 5 жыл бұрын

thanks to You sir. i feel humbled you are even thanking us.

@anisafifahfarzana326 4 жыл бұрын

At first, it is complicated for me to understand on how to interpret when we have more than two categories, but then I manage to understand clearly based on your explaination. It is very interesting video with a great graphical example.

@fatinhanani9423 4 жыл бұрын

Thank you so much, this is what im looking for. I can refer to this video for additional info !

@shadrinan90 2 жыл бұрын

Thank you for such clear explanaitions!

@syazninajwa5b183 4 жыл бұрын

after watching this video, now i become more clearly about dummy variables and the way to construct and interpret their coefficient. thanks for this video and explanation. its also interesting.

@sitinursyazwana5031 4 жыл бұрын

As a student this video is truely make me more understand. The explanation is very easy to understand with the example. Now I know on how to interpret more than two categories through this video.

@nykollas6601 6 жыл бұрын

Exceptional work !!

@Pommespanzerzockt 5 жыл бұрын

Hey man. Just wanted to let you know my Uni links to your vids as preparation, and you do them very well. Thanks for everything!

@azrulamizan2127 4 жыл бұрын

This video really make me understand how to interpret the coefficient. Really usefull. Thank you

@shahriarkhan6466 3 жыл бұрын

Thank you for making it so simple to understand.

@amirulezuar9754 4 жыл бұрын

For this video, it shows and helps how to interpret coefficient with two categories

9 жыл бұрын

tks so much! That's what i'm looking for.

@meghangohil5780 4 жыл бұрын

Thanks - this was a really clear explanation of dummy variables.

@nurulamira8975 4 жыл бұрын

Its look very hard to understand at first, but then when you come out with good example I manage to be more understand on how the dependent dummy variable changing depending categories. Thank you for very simple explanations .

@nurfarishaizwanie2082 4 жыл бұрын

good video because he keeps me more thinking. good information.

@ismahnadhirah3756 4 жыл бұрын

I have difficulty to understand on how to interpret when we have more than 2 categories before, but with your useful explanation, i can understand it clearly now. Thank you for your explanation

@cazung119 4 жыл бұрын

Thankyou so much for your teaching sir. You just saved my life I was very frustrating because I get confused more and more I couldn't wrap my head around all those terms and complex interpretation in my study and textbooks and need to do assignment. Now I have understood better and clear. Thankyou Thankyou Thankyou.

@liaalia789 4 жыл бұрын

By watching this video, it help me to understand more about what dummy variable is. It helps me to understand how to interpet the coefficient. Thank you for you explanation

@nurfarrahumairah3475 4 жыл бұрын

From this video, i can know how to interpret the coefficients in a multiple and multivariate regression because the lecturer using the simplest example to understand what actually he talking about. Thanks for this interesting video !

@nurfatinsyuhada5593 4 жыл бұрын

From the video now I know how to make a solution and interpret dummy variables coefficients even in multiple or in multivariate linear regression . It helps me a lot in understanding the lecture given because it gave us some simple examples for us to understand

@Sky-nr9pm 4 жыл бұрын

Your explanation so clear..it easy to understand. Thank you for sharing. It help me a lot..

@yan7133 4 жыл бұрын

It hard to understand on how to interpret when we have more than two categories, but then I manage to understand clearly when watch this video. I am glad to watch this video. It is very interesting video as it simple explanation that make me more understand.

@muhammad-dc4hm 4 жыл бұрын

This video really help me to understand about dummy variabe and how to interpret these coefficient. :)

@bhaktikelkar499 4 жыл бұрын

Thanks a ton! This video was extremely helpful

@shresthasaha9281 3 жыл бұрын

this is an excellent video !! thank you prof.

@datascience1274 2 жыл бұрын

Fantastic lesson. Thank you so much. It helped me immensively

@HK-no9wm 4 жыл бұрын

Excellent explanation. Thank you so much

@ProfDilley 9 жыл бұрын

Thank you for such a fantastic video! The concept of dummy variables was very clearly explained. This video is much better than all others out there I have seen posted on a similar topic. Thanks again!!

@Jjjj24971 Жыл бұрын

thank you for teaching everyone.

@saclay5032 2 жыл бұрын

Thanks a lot for this video and for the other ones, it helped me a lot!

@vilochanmuley1889 3 жыл бұрын

Awesome example and explaination👍

@ispinozist7941 6 жыл бұрын

Well done 👏🏻 I will note that the final model has an adjusted R squared suggesting that 28% of variability is explained by the IVs, which is interesting in and of itself.

@nanaheyy_ 4 жыл бұрын

thanks ! great explanation about dummy variables and it helps me a lot as a student

@alifradzali6961 4 жыл бұрын

It all about the dummy variable and i slowly learn what is dummy variable. How to use and and interpret it in the coefficient in a multiple or multivariate linear regression. It take time for me to understand it. However, i like your video because giving a simple example to make me understand more about it. Thanks in advance. :)

@nurizzatiahmadshukri6923 4 жыл бұрын

Your explanation was very helpful. Before this I have problem on how to interpret the coefficients but now I'm bit understand compare than before.

@justinfong2388 6 жыл бұрын

Great video, so clear

@abdulhadi5b263 4 жыл бұрын

Thank you for your explanation. I hope it help me to answer the test question. This video help me a lot how to understanding dummy variable

@amosavi4730 6 жыл бұрын

Very clear and useful... Thanks a lot

@thomashunterguitar7379 6 жыл бұрын

the last bit was what i needed

@kiranthota5137 4 жыл бұрын

my brain says cool. soft voice & good way of explination, all the best for your career, try to explore more

@mahzaibyounas2106 6 жыл бұрын

thanks you have cleared all ambiguities

@stivosaurus 8 жыл бұрын

Very nice explanation. My brain was hanging up on the meaning of the coefficients, but the idea seems obvious now.

@farahnadiah2308 4 жыл бұрын

It is very useful for me due to the explanation and the example are close to me as a student. It make me figure out what dummy do and how to explained it.

@ivancarrascoq 6 жыл бұрын

good explanation man! thanks.

@nurulnajihah9499 4 жыл бұрын

Thank you for your explanation 👍, now i can understand better

@debk4516 5 жыл бұрын

wow..thanks you so much for this video

@imadeadblueangel 4 жыл бұрын

i struggled understanding what is this dumb*** dummy variables are the entire semester and got 0 for interpreting the coefficient wrongly in mid term exam, thank god i found this video!!! make sense now on the comparing expected salary of treatment group to the control variable!!! thank you, you are awesome!!!!

@ekwuemeanthony3870 Жыл бұрын

Kudos to you dear we appreciate your efforts. thanks 👍👍👍 👍

@lm2182 3 жыл бұрын

thank you for the amazing video

@dai7169 5 жыл бұрын

Great video, thank you very much

@AntuAichbd 7 жыл бұрын

Thanks a lot. The video is very helpful :)

@bellainasia6107 5 жыл бұрын

very great video.thank u so much

@pradeepasivanesan 4 жыл бұрын

Thanks a lot. Really helpful.

@clarawolf5569 4 жыл бұрын

You're the best. Thank you...

@jimivie 4 жыл бұрын

dude you are amazing. 10 out of 10

@ziweiyong3634 8 жыл бұрын

this is truly helpful!!!!!! Love U

@ahmadsafwan5801 4 жыл бұрын

This really help me in understand for my ECO 545 subjcet chapter. I hope this understanding will help me to answer my test tommorrow on 30 june 2020. Wish me luck guys.