Step 1: Create Cloning Machine. Step 2: Clone him 10,000 times. Step 3: Replace all teachers/professors/tutors BOOM! Every problem in the world has been solved.
just with your voice and some tech, you "teach" and make me happy (cause i understand from your tell) i cant imagine how helpful and wonderful your class would be if we could actually see you. Thanks a lot!!
Khan uses a program called SmoothDraw 3 and then uses a tablet to draw all the diagrams and shapes. Then he uses a screen capture program called Camtasia Studio to record all this in a video format.
That and we are done was so satisfying after the 4 lecture series. Even Sal khan hived a sigh of relief! And yes I can’t thank enough for the quality of education that is being provided for free. Brings tears to my eyes. Applied for translator for my native language hope I get the chance to contribute.
I have to say "Thank you! " to Khan. The regression knowledge should be leant in High school in Guangdong, China, which is 13 years ago for me. But it's an optional section actually, I never tried to learn it and it made me lost 10 points in college entrance examination. After I went in the colleauge, I was scared by the Higher Mathematics course because it need a base of regression, that's why I cannot continute my performance on study any more. Today I found the good feeling with math again, and I will continute my math learning, at 30 years old
Doing it in fractions is the best part of the video. To add or subtract with fractions they have to share the same denominator (the number below the line). 7 written as a fraction is 7/1, to get the same denominator as the fraction he wants to subtract from (49/9) multiply both top and bottom by 9. 7*9=63 and 1*9=9, so 7/1 = 63/9. Then it's plain arithmetic to subtract one fraction from the other: 49/9 - 63/9 = (49-63)/9 = -14/9
Kahn *halves* 7,3 to get 3.5,1.5 so he can draw that point on the small plot, which only goes up to 4 on the x-axis. Then he plots the worst 1.5 ever, so he has to adjust the line later. :D 3.5,1.5 is *halfway* to 7,3 on the *same line* starting at 1, where it intercepts the y-axis. 7/3 is the slope (for every 7 on the x-axis it increases 3 on the y-axis), so *half* the increase in x, means half the increase in y. Any straight line can be drawn from those 2 values, the intercept and slope.
Thank you Khan Academy. I love your voice more than the other teachers, by the way. I always look for you first before settling with the someone else (only if you don't teach the topic I am looking for) :-)
if it's rise over run 7run 3 rise I'm confused so bad why you are doing 3.5 over. 5 up omg and I have an exam in one hour I totally got everything u taught except that part
I know there is a way to calculate the averages using series. For example AVGX = (n+1)/2 or AVG(X^2) = (N * (N + 1) * (2N + 1)) / 6. There is no series possible of the Ys, we can only do AVGY = sum(y)/n. How would you calculate AVGXY in excel without doing x1y1+x2y2+x3y3....etc? Do you think of a way to calculate AVGXY from AVGY and n? (don't want to use the excel trendline function).
So you do not have negative numbers. You do not really care if the point lies below or above the line(in this example). And I guess that you want to have more smaller distances than one huge distance. That huge distance squared becomes too big number
My stats prof should really start watching Kan Academy, the formula she uses is so unnecessarily diffocult now that I've seen this.
Step 1: Create Cloning Machine.
Step 2: Clone him 10,000 times.
Step 3: Replace all teachers/professors/tutors
BOOM! Every problem in the world has been solved.
no
You can also solve the problem by helping other teachers become better.
under the assumption "all clone will have the same ability and knowledge and personality of the original"which is not true
just with your voice and some tech, you "teach" and make me happy (cause i understand from your tell) i cant imagine how helpful and wonderful your class would be if we could actually see you. Thanks a lot!!
Lol I soooo agree. I love his voice so now I have a crush lolololol
Khan uses a program called SmoothDraw 3 and then uses a tablet to draw all the diagrams and shapes. Then he uses a screen capture program called Camtasia Studio to record all this in a video format.
You know, I was wondering this actually. ;)
That and we are done was so satisfying after the 4 lecture series. Even Sal khan hived a sigh of relief! And yes I can’t thank enough for the quality of education that is being provided for free. Brings tears to my eyes. Applied for translator for my native language hope I get the chance to contribute.
I have to say "Thank you! " to Khan. The regression knowledge should be leant in High school in Guangdong, China, which is 13 years ago for me. But it's an optional section actually, I never tried to learn it and it made me lost 10 points in college entrance examination. After I went in the colleauge, I was scared by the Higher Mathematics course because it need a base of regression, that's why I cannot continute my performance on study any more. Today I found the good feeling with math again, and I will continute my math learning, at 30 years old
Doing it in fractions is the best part of the video.
To add or subtract with fractions they have to share the same denominator (the number below the line).
7 written as a fraction is 7/1, to get the same denominator as the fraction he wants to subtract from (49/9) multiply both top and bottom by 9.
7*9=63 and 1*9=9, so 7/1 = 63/9.
Then it's plain arithmetic to subtract one fraction from the other: 49/9 - 63/9 = (49-63)/9 = -14/9
@m dev you wrote that 8 years ago... I hope you have PhD in mathematics at this point.
Kahn *halves* 7,3 to get 3.5,1.5 so he can draw that point on the small plot, which only goes up to 4 on the x-axis. Then he plots the worst 1.5 ever, so he has to adjust the line later. :D
3.5,1.5 is *halfway* to 7,3 on the *same line* starting at 1, where it intercepts the y-axis. 7/3 is the slope (for every 7 on the x-axis it increases 3 on the y-axis), so *half* the increase in x, means half the increase in y.
Any straight line can be drawn from those 2 values, the intercept and slope.
Dude, hats off!! Thanks
Thanks for the regression-line saga and the example. Keep on going.
This is awesome. Thank you so much. Excellent tuition.
Thank you Khan Academy. I love your voice more than the other teachers, by the way. I always look for you first before settling with the someone else (only if you don't teach the topic I am looking for) :-)
@ 7:33 16/2 is not 7 ... the Slope (m) must've been 3/8
THANK YOU SO MUCH. THIS WAS SO HELPFUL!!!! : )
Thanks for the video Sal except towards the end instead of marking 1.5 for Y you marked 2.5 for Y
!!!!!!!!MADRE MIA!!!!!!!!!!!!. i am amazed by the depth of this amazingly deep sea of knowledge that you hold.
I thank you very much indeed!
Thank! Gives me an idea, but i need more details. Like why 3, 7 turn into 3.5 and 1.5????
Because there is not enough space there. So, he divides 3/7 by 2 equals 1.5/3.5. Sorry for being late for 8 years.
I've always been told this is too complicated to do any other way than by using Excel. You have just shown me this is not true. Thank you!
Thanks a lot
I see a noble prize in your future.
for real. I actually think he's deserving of one but wont receive recognition. He's helped me across so many subjects especially chemistry
May you inherit eternal awesomeness!
wow that was an excellent way of explaining it. Thank you
nice video.. helped me a lot... can you tell me what program you use to draw the things on ??? btw really helped me out on my math homework !!!!
"lets do something a little bit crazy, 3...no...(4,3)!" woah thats insane dude
Ok. That was cool.
if it's rise over run 7run 3 rise I'm confused so bad why you are doing 3.5 over. 5 up omg and I have an exam in one hour I totally got everything u taught except that part
he divided both 7 and 3 by 2; 7/3= 3.5/1.5 and the reason he did that is that he didn't have enough space on the board
how was the exam 😂🔫
Magnificent !
I know there is a way to calculate the averages using series. For example AVGX = (n+1)/2 or AVG(X^2) = (N * (N + 1) * (2N + 1)) / 6. There is no series possible of the Ys, we can only do AVGY = sum(y)/n. How would you calculate AVGXY in excel without doing x1y1+x2y2+x3y3....etc? Do you think of a way to calculate AVGXY from AVGY and n? (don't want to use the excel trendline function).
Just reviewing some algebra and relearn it to use with stats.
great !!!!!
This formulas can be used both in total population and sample populations, right?
why is it always called a regression line if the points can have a positive correlation just like in this example?
Khan: now lets do something crazy...
Me: make x=1999984!
Kahn: (4,3)
So you do not have negative numbers. You do not really care if the point lies below or above the line(in this example). And I guess that you want to have more smaller distances than one huge distance. That huge distance squared becomes too big number
fraction 3/7=1.5/3.5
my brain couldn't process the 3+1/2 we run we rise 1+1/2, thanks!
all that math for 1 answer huh? wow. How long are statistics exams...6 hours?
what's the video before this one?
Круто!
this is super helpful! thumbs up! ^_^
first
7=63/9
why is the "squared" distance why cant it be the cubed distance for instance what is so special about it being squared ?
Makes them positive. You could use power of 4, but the equation would be more complicated