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Always Learning
Добавлен 12 фев 2017
Learning is cool.
An explanation of the Coefficient of Determination R^2
An explanation of the Coefficient of Determination R^2
Просмотров: 1 272
Видео
Linear Regression: Calculating the best fit linear line
Просмотров 17 тыс.7 лет назад
Linear Regression: Calculating the best fit linear line
Linear Regression: Total squared error is easier than total absolute error!
Просмотров 4,6 тыс.7 лет назад
Derivation of the equations for m and b: www.khanacademy.org/math/statistics-probability/describing-relationships-quantitative-data/residuals-least-squares-rsquared/v/proof-part-1-minimizing-squared-error-to-regression-line
Linear Regression: Total absolute error vs total squared error
Просмотров 2 тыс.7 лет назад
Linear Regression: Total absolute error vs total squared error
Linear Regression: Minimizing the total absolute and total squared errors. Part 2
Просмотров 1,8 тыс.7 лет назад
Linear Regression: Minimizing the total absolute and total squared errors. Part 2
Linear Regression: Minimizing the total absolute and total squared errors. Part 1
Просмотров 5767 лет назад
Linear Regression: Minimizing the total absolute and total squared errors. Part 1
Linear Regression: But is it the BEST trend line??
Просмотров 3827 лет назад
Linear Regression: But is it the BEST trend line??
Linear Regression: We pretty much calculated the variance!
Просмотров 5777 лет назад
Linear Regression: We pretty much calculated the variance!
Linear Regression: Comparing a trend line to the mean line
Просмотров 8447 лет назад
Linear Regression: Comparing a trend line to the mean line
Linear Regression: Making a linear trend line
Просмотров 27 тыс.7 лет назад
Khan Academy Link for trend lines: www.khanacademy.org/math/statistics-probability/describing-relationships-quantitative-data/regression-library/v/fitting-a-line-to-data
Sum notation in mathematics. Part 1
Просмотров 6477 лет назад
Part 2: ruclips.net/video/XGu6Ym3An3k/видео.html
Variance: Why we use the squared deviation instead of absolute deviation
Просмотров 12 тыс.7 лет назад
This is my attempt to explain why we use squared deviation instead of absolute deviation to calculate variance. Spoiler alert! I have no good reason...
Variance: Why we divide by n
Просмотров 6487 лет назад
This is my attempt to explain why we divide by n when calculating variance.
Variance: A simple explanation. Part 3
Просмотров 1757 лет назад
Variance: A simple explanation. Part 3
Variance: A simple explanation. Part 2
Просмотров 1947 лет назад
Variance: A simple explanation. Part 2
Variance: A simple explanation. Part 1
Просмотров 4157 лет назад
Variance: A simple explanation. Part 1
Rubbish
bro makes up some fire puppy names on the spot
The short answer is, it's arbitrary. Created, like all math. That said, there is reason for it. He references some at the end, but otherwise is demonstrating what the ^2 does mathematically instead of absolute value. Not a "deep" video, but I got my answer actually. So thanks.
Thanks man. Your previous three or four videos together with this video have helped me a bunch to understand the logic and roots of Linear regression. Thanks a bunch,😀 friend.
Thorough explanation. Helpful. Thanks!
Awesome
outstanding explanation.
I was taught that three lines on an equals sign means "always equal to" so I definitely wouldn't use it for anything to do with algebra or variables
You forgot a very important usage of the subscript and superscript: sequence enumeration, example: A^(4)_(n=1). Sequence A, with a superscript of 4, and subscript of n=1, means that sequence A start from the element 1 and goes to element 4, so a total of 4 elements in the sequence. This doesn't directly tell you what the actual elements are, just how many of them are there and their ordered locations in the sequence. Another usage is interval notation, the subscript tells you where the interval starts, and the superscript tells you where the interval ends. [F]^(4)_(1) says the function F from x=1 to x=4. Logarithms can also use subscripts, like log_2 (x) where 2 is the subscript, read: log base 2 of x So it's very important to know the context of the problem at hand, because math often reuses the same notation in multiple places for different proposes. People who first wrote those notations were't thinking of the newbies, it's like math gatekeeping lol
This is what I was looking for!
the reliebility of this video comes from the use of a sharpie
i watch the whole video, but what do i get, "linear regression and all other skew of reasons"
This is golden... Thanks a whole lot!
Bastard
Subscribed just because of bellyrubs😊
that's the worst tutorial I ever had to see in my life
Saved me
In the end you didn't explain why we used sqaured deviation. Please change the title of your video.
That was exactly what I had been waiting for and in the end I got to know, quote unquote "there are a whole lot other reasons and we'll get to them next time".
Why don’t you use a real graph
Entry of puppy is amazing 😀.
So the title of is a question that u suppose to answer it and explain it , but all you said is "a guy said so " , that by one of the useless video I watched
the explanation was great, thanks
Great video. 1 question: what data do you use to calculate the position of the trendline?
Bruh how many times are you going to misspell subscript
This is shit
I never took maths past the age of 16, turns out you need it to do a science degree, you just saved me yet another embarrassing question. Thank you!
Why choose 4? what is your basis?
So standard deviation penalizes the outliers more than the mean absolute deviation. Thanks for making this video!
No. Absolute Deviation is not the same as standard deviation. Standard Deviation is the square root of the variance. Absolute deviation is the average of all the residuals. Notice that you do NOT get the variable is you square the absolute deviation.
I have to gently agree with others here. I like the video, but it fails to explain why standard deviation is being used over the MAD. Good video - misleading title.
didn't get my answer but it was nice
Misleading video title. 6min read gave me enough understanding / acceptance of the use of squared deviation here www.semanticerror.com/why-do-we-take-squared-values-of-difference-instead-of-absolute-values-while-calculating-variance/
Ok this is a total click bait. Make me mad a little bit. This should be re title as What is variance.
you are excellent, I watched the complete series. a lot of thanks to you june. hopefully you make more videos on all types of regression.
At last got the perfect solution!
if you have , for instance, X sub1, and X sub2, are they not considered to be like terms? thank you
This was a very helpful video.
I don't understand a word you're talking about...I am in 9th grade and I just wanna understand subscripts in mathematics because I saw this line in a book "a(variable) subscript n(variable) is not equal to zero" and some more crap so I just wanna understand it☹
He's is talking in English language with a perfect accent. Why can't you understand his words?
@@monalishadey3657 he doesnt understand the combination of words, idiot.
"a(variable) subscript n(variable) is not equal to zero" this is written as a_n =/= 0 right? With no context I believe this probably means that "a" is some kind of sequence, and "a_n = 0" is saying no element "n" in the sequence "a" is equal to zero. So zero is not part of the sequence. He didn't mention the most common use of subscript in math, which is sequence enumeration.
The simple answer is because I told you so? oh my
I can teach you why beacaus your such an idiot
Thanks - very helpful and to the point
why you forget the "r" everytime
thank you :)
Brilliant explanation!
you didnt calculate the fucking standart deviation with the 2 methode sbecaussse i want to khow if both of theme give the same result or not fuuuuuuuuuuuuuuuckeeer 13min of nothing
Dear sir , why did you use the word "around " while defining Variance ? (Variance is howmuch a population varies 'around 'the mean) why not use 'from' the mean?
I think "around" is used because of the mean being in the middle somewhere and values deviating above (to the right) and below (to the left). I think "from" is also fine for "deviation from the mean." I don't think people generally say "variance from the mean," but if you used this phrasing probably everyone would understand you anyway.
@@logantate3269 Thank you very much sir
Just now wasted my 13.44 mins
Thanks for the honesty. Seriously. Most teachers just try to give me BS reasons and it’s annoying.
What does BS mean?
@@tianyiyin4847 bullshit
Thank you. Everyone else has been giving me BS answers like “absolute value is hard to undo”. nonsense like that. I expected it was something like this. Thank you for the honesty.
Haha. Those ppl don't get that square and square root is essentially an absolute value xD
2:35 He gets to the point...
Gina Rae omg thank u
lol it didn't even help
Yall need to learn how to not rush through
Thx
Wonderful Sir helped me a lot. Keep up the good work
How can you come up with a random line? You should choose the line with minimum variant
So three years later June should be sleeping about (365*3)*.5 hours a night?
i=7, not i=365*3. Listen clearly before mocking.