Oh my god you are so clear! Your 17 min video is more useful than the last month of lectures for data analytics at the university... Keep up the good work! :)
I wish i had a teacher for statistics like this guy. (i had a stupid one hated stats) but had to work with them and learned them myself.. you rock! excellent presentation
Sometimes I just get frustrated on our education system for just running behind marks and not making the students understand any of the stuff .Hope one day my country will also have great teachers like you who makes the student know clearly what they are learning. Thanks a lot sir,huge love and respect from India.
This channel has been so helpful to me, at the age of 36 and jumping into the local University, i feel like i need as much help as possible and your the most helpful person online. thank you so much.
Agreed, at 50 I jumped back into the University environment, and I wish all instructors had this guys skills at breaking down a problem and explaining it thoroughly. I often feel as if I am teaching myself, and have done so for the last 2 years. However, in the process I have learned even more.
Thank you! Thank you! Thank you! 5 statistics books, about ten videos, and a college course, and none explains what a variance actually is in such simple description
Very well explained...just have 2 questions 1) If problem was only with the negative elements then we could have taken the absolute value. Why did we do square only? 2) I would like to know the reason behind "n-1"?
so much easier than what my professor taught us. i was completely clueless of how to figure out the difference between variance and the mean. thank you
I wish most professors are THIS elaborate! I needed classes where they explain why we use the formula, what it gets for us, and basically the significance of it all. Few of the professors I had in Stats were going straight for the formula, and they didn't really explain the whats, whys and hows. I wish he was my Stat teacher, maybe I have fallen in love with Stats from then on!
I can't express how much I love the way you teach. it's so interesting and easy to understand. thank you so much for your initiative. I am a student of mass communication, and for my PhD program I need to learn statistics, and it seemed so pathetic to me. your lessons made me feel like statistics is as interesting as journalism itself. thanks you is a small world. but I mean it.
I thought I was innately bad at Math until I came across educators like yourself who really care about learning as opposed to getting through a curriculum. Thank you for this.
I'm a psychology student and you are my hero! cause our teacher doesn't explain to us what the words like variance and SD we use are he says the spss will do all calculations. Well, I want to understand the logic behind at least.
To "simply" do your work as it should be done, is already helping other people. And you do that beautifully, humbly and very effectively! God bless you for that! You are a truly master and professor! Thank you so very much!
This guy is very good teacher, he explains things in such detail it just sinks in..... Kudos, by-the-way i am a Financial Analyst and Investment Management student at the University of Toronto. Mr Math and Science guy thank you for your online material you doing a great job educating people of the planet .....
Amazing clarity. I learned this math in the early 1980s, studying for my Land Surveyor's license. I was sitting here trying to remember the math, and it occurred to me to look on TH-cam. Now I remember the unknown variables left for me in the field, by incompetent forbears, data points that were suspect just by virtue of who established them. I ended up co writing the license exam for a couple of years. I still have Hewlett-Packard RPN nightmares. So many people know how, but they don't know why. Thanks for being a great teacher. Maybe now I can penetrate my "great cloud of unknowing".
Absolutely incredible. You are a true legend, sir. Honestly, one of the best teachers out there and extremely patient in arriving at the answer with a logical and intuitive approach. Thanks so much
Oh my god. This video has helped so much. I dislike my current Stats prof... he explains nothing as well as this guy. Thank you!! I wasted hours in stats class only to learn it here in a fraction of the time!!
Almost all other stats videos never really explained the concepts but this guy teaches us in a way that it really gets sinked in deep in our minds. dam well done Sir.
I really find this video very helpful because professor try to explain the concept from perspective of a know-nothing student instead of giving hard terms. Respect a lot!
amazing description in everything, actually I am shocked by how this teacher consider himself as a simple student to not make explanations even a little bit complicated..thank you so much, teacher.
Million thanks from who study German language but take statistics lecture too. I speak Korean and your explanation is so clear that even I can understand very well. Thanks again for the lessons.
I thumbed up for this video because unlike in school, this guy has actually taught the reasoning behind variance. In school, we were literally just told to memorize the formula. Kudos
Dear Jason, thank you so much for this fantastic series on Statistics. I will purchase every single volume you put out on statistics. Everyone out there should recognize that Statistics and Data is the new oil of the 21st Century!
Please accept my gratitude 🙏 I've been browsing the internet for 20mins. just to understand what variance is. Now i finally get it because of you 🤧 Thank you so much Teacher 😇
This is an excellent video!!! None of the texts I have read have explained variance so well. One book did, in simple terms, explain that the reason that the "n - 1" is used as a denominator in the sample equation is that "the sample mean always underestimates the true variance in the population." There is actually a mathematically and statistically advanced reason for subtracting a simple one from the denominator, But "in the simplest terms remember that doing so helps raise the value of the outcome of the equation closer to the true variance of the population." (e.g. 20/5 = 4 however, 2/(5-1) =5)
instead of just memorizing the formula it's so much better to understand the meaning and make of the formula. this video is very helpful! thank you very much!
i heard you say u wanted to show the logical reasoning for the variance formula and my heart melted...... i do decision science now and i asked my tutor what is the logic behind some formula. guy started to explain, me knowing that this isnt what i asked stopped him, he then restarted to say the same thing after he finished his useless explanation he realized what i was asking then looked at me and said it was just the rule. so sir i thank you for being "as the kids say" a real one
Sir, this was a very clear and pure way to understand variance. I am very grateful to realize this. I am studying econometrics and i could never really fundamentally wrap my head around what the variance truly meant. It's easy to calculate, but for me to intuitively understand what the variance is at its core and the importance of this for statistics... is because of you. thank you
You bring it out clearly that teaching is a talent , you have got to be my best teacher for statistics from today and onwards, thank you so very much 14:08
I've had different statistics courses throughout my degree that I've kind of just been winging. For the first time, I actually understand this concept! You're an amazing teacher.
God bless you sir, you are an magnificent teacher. You do not really make us learn rather you make us understand the concepts from the ground level.Please accept my utmost regards.
Note that in the original function we multiply by p. The p is gone here. Since we sum up the "resulting" random variables and devide them by N, which is actually probability and it gives us p. So for two Xs X0=0 and X1=1 in bernuli or binomial disterbution we'd get p=0.5 since we have same amount of times each variable appearing in the same amount of results. Many thanks to you for the explanations!
This teacher is a genius. He explained it so clearly that even in sleep I can explain what variance is. He directly persist his teachings in first brain.
Awesome job of explaining what the variance is!!! I'm taking a correspondence course & therefore can't talk face to face with the teacher. You answered all of my questions!! Thanks!! :-)
Thank you so much for this explanation. This is the easiest / best explanation of variance and deviation. One question that might be stupid: can't we take the absolute value instead of squaring it? like Abs(7-5) + Abs(2-5)
it took me numerous books and videos to actually realise what sigma and sub i is, FINALLY somebody just assumes we might not know it and clearly states exactly every symbol used in the equation. THANK YOU. I have never had statistics in school, but if I had, I'd like you to teach me.
i m a medical student........hate maths..........but i must appreciate that ur explanation was incredibly easyyyyyyyyyyyyyy........................thankx a lot.....never undstud the concept before.................
Wow, u just explained wht all these parameters mean and wat we r dng with them step by step. Other videos just tell u theoretically, but you are brilliant just brilliant. Thank you.
I've been struggling to learn statistics for months... but it seems like these concepts are not willing to adjust in my brain.🙄🙄 but thanks to TH-cam that I got this video. You have solved all my doubts on deviation & variance in minutes 👍👍 thank you😊😊 Please make more video on statistics .
Excellent question!! Yes, you could also calculate using absolute values, BUT there are various problems with doing that. It turns out that when you SQUARE the differences between xi and the MEAN, you get a MINIMUM value. That is, if you do the same calculation with any number other than the MEAN, you get a larger value for the VARIANCE. if you perform an ABSOLUTE VALUE calculation, the MEAN no longer gives you a minimum. (It turns out that the MEDIAN gives a min.for the abs. value calculation).
OMG, this is the best explanation of variance! I've looked at various sources, and they are full of jargons and gibberish. Thank you for making it simple in plain English!
WOW! As a fine-art graduate trying to learn statistics, thank you so much for explaining STEP-BY-STEP. I was very struggling until you said it's the "average" of the distance from the mean. I can sleep nicely tonight :D
Lifesaver for my statistics topic, more than happy to purchase your full version at your website. The lecturer at my Uni just assumes us know what these concepts mean, and rush right into SPSS, but really, we need to understand why. BIG THANK YOU!!!
I very much appreciate how thoroughly he explains everything. He gives all the reasons why things do what they do, and reminds you not to be afraid of all the terminology.
Your explanations are crystal clear. Your explanations are easy to follow. I wish I had you for my statistics lecturer at the university. Thank you Sir!
![ละลาย (LALALYE) - DAOU PITTAYA ต้าห์อู๋ พิทยา [OFFICIAL MV]](http://i.ytimg.com/vi/wo6r9TgausI/mqdefault.jpg)
Oh my god you are so clear! Your 17 min video is more useful than the last month of lectures for data analytics at the university... Keep up the good work! :)
Follow @ sangni statistics
SO BLOOMIN TRUE!
I wish i had a teacher for statistics like this guy. (i had a stupid one hated stats) but had to work with them and learned them myself.. you rock! excellent presentation
Nova Cane ditto
i had the most stupid teacher you can even imagine in statistics.
The same to me. I wish he could be my teacher. It's my first time to understand variance in my entire life
Same here...
Yo bro.....same situation was there
Looked at several tutorials; this by far is the most direct approach. Thank you.
Follow @sangni statistics
I love this tutor, this is the way to teach students, he makes it very basic and teaches it in an applied way. I wished I had known him earlier
Sometimes I just get frustrated on our education system for just running behind marks and not making the students understand any of the stuff .Hope one day my country will also have great teachers like you who makes the student know clearly what they are learning. Thanks a lot sir,huge love and respect from India.
There should be an award for making a 17 minute math video feel like it was over before it started. This guy understands how to teach.
Thanks so much!
This channel has been so helpful to me, at the age of 36 and jumping into the local University, i feel like i need as much help as possible and your the most helpful person online. thank you so much.
Agreed, at 50 I jumped back into the University environment, and I wish all instructors had this guys skills at breaking down a problem and explaining it thoroughly. I often feel as if I am teaching myself, and have done so for the last 2 years. However, in the process I have learned even more.
I've been trying to understand what variance was actually for all year and you've explained it in 17 minutes. Thank you
Thank you! Thank you! Thank you!
5 statistics books, about ten videos, and a college course, and none explains what a variance actually is in such simple description
Follow @sangni statistics
Very well explained...just have 2 questions
1) If problem was only with the negative elements then we could have taken the absolute value. Why did we do square only?
2) I would like to know the reason behind "n-1"?
so much easier than what my professor taught us. i was completely clueless of how to figure out the difference between variance and the mean. thank you
I wish most professors are THIS elaborate! I needed classes where they explain why we use the formula, what it gets for us, and basically the significance of it all. Few of the professors I had in Stats were going straight for the formula, and they didn't really explain the whats, whys and hows. I wish he was my Stat teacher, maybe I have fallen in love with Stats from then on!
I can't express how much I love the way you teach. it's so interesting and easy to understand. thank you so much for your initiative. I am a student of mass communication, and for my PhD program I need to learn statistics, and it seemed so pathetic to me. your lessons made me feel like statistics is as interesting as journalism itself. thanks you is a small world. but I mean it.
I thought I was innately bad at Math until I came across educators like yourself who really care about learning as opposed to getting through a curriculum. Thank you for this.
My statistic course is completely online. Finding you tube is my lifeline. Its a complete statistics course in 5 weeks. This video is super helpful
I'm a psychology student and you are my hero! cause our teacher doesn't explain to us what the words like variance and SD we use are he says the spss will do all calculations. Well, I want to understand the logic behind at least.
You are VERY GOOD TEACHER.
Please follow @sangni statistics
@sangnistatistics
raashid khan hi
Hello
Are you good at stats?
To "simply" do your work as it should be done, is already helping other people. And you do that beautifully, humbly and very effectively! God bless you for that! You are a truly master and professor! Thank you so very much!
This guy is very good teacher, he explains things in such detail it just sinks in..... Kudos, by-the-way i am a Financial Analyst and Investment Management student at the University of Toronto. Mr Math and Science guy thank you for your online material you doing a great job educating people of the planet .....
I am paying loads of money to university each year, and yet I got my stats enlightenment on your video. Thanks
I'm familiar with this concept, but this by far the clearest and best explanation I've encountered. Respect!
Amazing clarity. I learned this math in the early 1980s, studying for my Land Surveyor's license. I was sitting here trying to remember the math, and it occurred to me to look on TH-cam. Now I remember the unknown variables left for me in the field, by incompetent forbears, data points that were suspect just by virtue of who established them. I ended up co writing the license exam for a couple of years. I still have Hewlett-Packard RPN nightmares. So many people know how, but they don't know why. Thanks for being a great teacher. Maybe now I can penetrate my "great cloud of unknowing".
Absolutely incredible. You are a true legend, sir. Honestly, one of the best teachers out there and extremely patient in arriving at the answer with a logical and intuitive approach. Thanks so much
Mister, you are a teacher everyone is wishing for. Thank you.
Oh my god. This video has helped so much. I dislike my current Stats prof... he explains nothing as well as this guy. Thank you!! I wasted hours in stats class only to learn it here in a fraction of the time!!
Almost all other stats videos never really explained the concepts but this guy teaches us in a way that it really gets sinked in deep in our minds. dam well done Sir.
Great thank you!
I really find this video very helpful because professor try to explain the concept from perspective of a know-nothing student instead of giving hard terms. Respect a lot!
Finally! I now thoroughly understand variance, thank you! I wish all my professors would speak this clearly when teaching about complicated subjects.
amazing description in everything, actually I am shocked by how this teacher consider himself as a simple student to not make explanations even a little bit complicated..thank you so much, teacher.
This 17 minute lecture taught me more than several weeks of statistics at my university
Awesome!
I have learnt Statics in College and Other courses but now I have have actually got a clear understanding for it. the best explanation.
This is the best explanation I have seen. Finally a teacher who understands that students need to feel the concept in their guts!
Million thanks from who study German language but take statistics lecture too.
I speak Korean and your explanation is so clear that even I can understand very well. Thanks again for the lessons.
I thumbed up for this video because unlike in school, this guy has actually taught the reasoning behind variance.
In school, we were literally just told to memorize the formula.
Kudos
The simplicity of your explanation makes this topic very understandable in one go!
Just want to let you know, even after a decade your video is helping impart the knowledge and help people like me understand things better...
Dear Jason, thank you so much for this fantastic series on Statistics. I will purchase every single volume you put out on statistics. Everyone out there should recognize that Statistics and Data is the new oil of the 21st Century!
Please accept my gratitude 🙏 I've been browsing the internet for 20mins. just to understand what variance is. Now i finally get it because of you 🤧 Thank you so much Teacher 😇
you are the only person who make me understand this topic. you born to be a lecturer. thank you.
Supreme quality of teaching. I wish all professor explain things as crystal clear as he does. Two thumbs up Sir!
So happy you liked it!
Jason, MathAndScience.com
This is an excellent video!!! None of the texts I have read have explained variance so well. One book did, in simple terms, explain that the reason that the "n - 1" is used as a denominator in the sample equation is that "the sample mean always underestimates the true variance in the population." There is actually a mathematically and statistically advanced reason for subtracting a simple one from the denominator, But "in the simplest terms remember that doing so helps raise the value of the outcome of the equation closer to the true variance of the population." (e.g. 20/5 = 4 however, 2/(5-1) =5)
instead of just memorizing the formula it's so much better to understand the meaning and make of the formula. this video is very helpful! thank you very much!
i heard you say u wanted to show the logical reasoning for the variance formula and my heart melted...... i do decision science now and i asked my tutor what is the logic behind some formula. guy started to explain, me knowing that this isnt what i asked stopped him, he then restarted to say the same thing after he finished his useless explanation he realized what i was asking then looked at me and said it was just the rule.
so sir i thank you for being "as the kids say" a real one
You have to watch 2 or 3 times, to appreciate.
Very detailed, thumbs up.
Sir, this was a very clear and pure way to understand variance. I am very grateful to realize this. I am studying econometrics and i could never really fundamentally wrap my head around what the variance truly meant. It's easy to calculate, but for me to intuitively understand what the variance is at its core and the importance of this for statistics... is because of you. thank you
You bring it out clearly that teaching is a talent , you have got to be my best teacher for statistics from today and onwards, thank you so very much 14:08
I spent learning stats for 2 years and you explained the concept in just 18 minutes. You should create a Udemy Course.
I watched so many statistics videos on TH-cam, I have to say, he is the best!!!
I've had different statistics courses throughout my degree that I've kind of just been winging. For the first time, I actually understand this concept! You're an amazing teacher.
Now i undestand
Teaching is the tallent hence any body can be a teacher but not a good teacher
I apreciate this is the good teacher
God bless you sir, you are an magnificent teacher. You do not really make us learn rather you make us understand the concepts from the ground level.Please accept my utmost regards.
EXCELLENT LESSON, FINALLY UNDERSTAND VARIANCE. WE NEED TEACHERS LIKE THIS IN K-12!
by far the best ever, online AND in reality. I am purchasing the rest of the courses right away. its priceless.
Note that in the original function we multiply by p. The p is gone here. Since we sum up the "resulting" random variables and devide them by N, which is actually probability and it gives us p.
So for two Xs X0=0 and X1=1 in bernuli or binomial disterbution we'd get p=0.5 since we have same amount of times each variable appearing in the same amount of results. Many thanks to you for the explanations!
This teacher is a genius. He explained it so clearly that even in sleep I can explain what variance is. He directly persist his teachings in first brain.
So many places tell you HOW to calculate variance, but this was the first I found that explained WHY you need to do it and what it's used for.
Passed my statistics exam because of you, thank you very much.
You bring it out clearly that teaching is a talent , you have got to be my best teacher for statistics from today and onwards, thank you so very much
Awesome job of explaining what the variance is!!! I'm taking a correspondence course & therefore can't talk face to face with the teacher. You answered all of my questions!! Thanks!! :-)
Thanks God I found this channel. His way of teaching is superb.
This is BY FAR the best explanation I've heard yet. Thank you.
I do not know what I would do without this guy.
You make it look so easy. My stat teacher spent an hour explaining this concept yet I couldn't understand. Thank you so much.
Thank you so much for this explanation. This is the easiest / best explanation of variance and deviation. One question that might be stupid: can't we take the absolute value instead of squaring it? like Abs(7-5) + Abs(2-5)
First read it in concept of probability than see this videos gives you a simple fabulous understanding.
I'm reading and seeing many pages on google and youtube. I just wanna say that's the best explain for variance. Thank you
Follow @sangni statistics
it took me numerous books and videos to actually realise what sigma and sub i is, FINALLY somebody just assumes we might not know it and clearly states exactly every symbol used in the equation. THANK YOU. I have never had statistics in school, but if I had, I'd like you to teach me.
i m a medical student........hate maths..........but i must appreciate that ur explanation was incredibly easyyyyyyyyyyyyyy........................thankx a lot.....never undstud the concept before.................
Wow, you explained this very well. I read the book, however, I wasn't able to understand it. I now understand it after watching this video, thank you.
Greatest teacher i'd seen ever
Sir i can't tell you how much you have thought me , thank you
I wish I would have found this channel before, such clear explanation that the concept would get ingrained in your brain, hats off sir!
This man made me love statistic this trim in school. I couldn't have gotten a better explanation than this. thank you sir
wondeful lecture, wish i had a lecturer like him before.
This is explained so well, especially for a beginner, thank you!
Wow, u just explained wht all these parameters mean and wat we r dng with them step by step. Other videos just tell u theoretically, but you are brilliant just brilliant. Thank you.
You are very welcome!
We need more teachers with the same skills that you have!
I've been struggling to learn statistics for months... but it seems like these concepts are not willing to adjust in my brain.🙄🙄
but thanks to TH-cam that I got this video.
You have solved all my doubts on deviation & variance in minutes 👍👍
thank you😊😊
Please make more video on statistics .
Happy to help!
Thanks a lot. I am an IT student, just needed to know what variance is for a filter that Im using. you explained it perfectly, in detail but simple
What a great explanation! Thank you a lot, Professor. The world needs more instructors like you!
Excellent question!! Yes, you could also calculate using absolute values, BUT there are various problems with doing that. It turns out that when you SQUARE the differences between xi and the MEAN, you get a MINIMUM value. That is, if you do the same calculation with any number other than the MEAN, you get a larger value for the VARIANCE. if you perform an ABSOLUTE VALUE calculation, the MEAN no longer gives you a minimum. (It turns out that the MEDIAN gives a min.for the abs. value calculation).
OMG, this is the best explanation of variance! I've looked at various sources, and they are full of jargons and gibberish. Thank you for making it simple in plain English!
This was very informative; I am in a statistics class this semester, and I actually understood what he was explaining.
You bring it out that teaching is a talent
Thank you for breaking this equation down and making it so easy to understand.
WOW! As a fine-art graduate trying to learn statistics, thank you so much for explaining STEP-BY-STEP. I was very struggling until you said it's the "average" of the distance from the mean. I can sleep nicely tonight :D
finally, someone who can really describe and teach statistics.
Really, you made me understand statistics, you are more than a teacher, thanks a lot
You are most welcome!
Lifesaver for my statistics topic, more than happy to purchase your full version at your website. The lecturer at my Uni just assumes us know what these concepts mean, and rush right into SPSS, but really, we need to understand why. BIG THANK YOU!!!
I very much appreciate how thoroughly he explains everything. He gives all the reasons why things do what they do, and reminds you not to be afraid of all the terminology.
Your explanations are crystal clear. Your explanations are easy to follow. I wish I had you for my statistics lecturer at the university. Thank you Sir!
The explanation couldn't have been better than this. Thank you.
WOW this is the best explanation ever!!!!!!!!!!!!!!! Thanks a lot for such detailed explanation
Six years later, and yet he is still a god-tier teacher :0)!!!
The best teacher ever!
This is the best video I've seen so far about this. Thank you sir.
Excellent tutorial; the instructor was very good, good diction and explains things very easily.
I really appreciate it!
Best statistics teacher ever
Your explanation is so incredible, l tried other videos to understand stat terms was so difficult but with yours now is very clear. Many thanks!
This helped out with an upper-level biopsych course covering the stats of genetic heritability. Thank you!