Calculating correlation coefficient r | AP Statistics | Khan Academy
ฝัง
- เผยแพร่เมื่อ 10 ก.ค. 2017
- Courses on Khan Academy are always 100% free. Start practicing-and saving your progress-now: www.khanacademy.org/math/ap-s...
Calculating correlation coefficient r. Intuition behind the calculation and r.
View more lessons or practice this subject at www.khanacademy.org/math/ap-st...
AP Statistics on Khan Academy: Meet one of our writers for AP¨_ Statistics, Jeff. A former high school teacher for 10 years in Kalamazoo, Michigan, Jeff taught Algebra 1, Geometry, Algebra 2, Introductory Statistics, and AP¨_ Statistics. Today he's hard at work creating new exercises and articles for AP¨_ Statistics.
Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today!
Donate here: www.khanacademy.org/donate?ut...
Volunteer here: www.khanacademy.org/contribut...
Statistics shreds my mind
*AP Stats
Says it in the title XD
Feels like AP, TBH
ME TOO
Agree but I am determine to learn it. Especially since I need it for my degree and career path
@@oneilanelson9231 welp turns out I ended up doing pretty well in my class haha. It's just one of those things that just clicks eventually. Keep at it, you got it!
@@Theswitchy1 I took AP stats last year and now I am in college taking Applied Statistics (a jr year level course) and I lowkey miss these old stats days! Now I am just looking back at these notes because I forgot some stuff sadly.
So my professor sucks at explaining things! Now, you’re officially my professor this semester LOL
Your professor I’m in 9th grade😩
@@starboyxayy bro i’m in 8th😭😭
Isn't that how it goes for all classes lol
Can't believe my teacher gave us *30* sets of data, and asked to calculate the correlation coefficient by hand.
What an absolute @#&!
i would actually write that as ... what an l@$$l
lol just program a computer to do it
Why dont you snap away your answers
How does this one guy know so much
Matthew Barber big brain
Matthew Barber because coronavirus
@@MemeGang420 yes
@Thanos yes
This helped me understand what to do, but my teacher gave me way more than 4 numbers to calculate. It's going to take all day :(
this man's voice is somehow soothing
Thank you so much for explaining so simple and accurate
I came to this video like 3 times and I still don’t get it💀
You just dumb ngl
whatd you get on the ap test
Man you are indeed a teacher. Thanks
perfectly explained, thank you very much!
This really helped me to understand my work better.
Explaining correlation in terms of z-scores is super helpful thank you 🙏
So thankful for this video!
I honestly have to say. This dude is the smartest guy I have ever see. Like legit.
So good! Thanks!
Awesome explanation! Thank you.
Thank you so much for explaining so simple and accurate. Hello, greetings from undip college student
I finally understand r-score! Thank you thank you thank you!!!!! I have a test in 2 days on this and it finally clicks
This all goes over my head, every time I watch/read
Glory to God this guy is blessing my life!!!
Great video! Thanks sal!
Hello Sir, How do we calculate correlation for polynomials...?
This is so funny. You used a pun. In r/our relationship here lol. And you are so happy about your only having 4 I heard it lol
this is mind blowing
The line should actually go through the mean and the intersections of the standard deviation lines right?
Thanks I love statistic.
What is the intuition behind (2,3) having a negative contribution to R?
Thanks
Kindly tell the factors which affect coefficient correlation
thanks fam
can u make videos on calculus based statistics and calculus based physics
Johaer Jilani
I would really love Calculus based statistics. It's way more fun. Instead of adding a bunch of rectangles under a density curve, let's integrate.
This couldn’t be more helpful.
but how to calculate Sx and Yx ?
To calculate Sx or Sy, you need to calculate the variance for both X and Y, then you calculate standard deviation, in our case Sx and Sy.
Sx is calculated at about 1:35, and he has other videos about standard deviation if you need more in-depth help with it.
Can you explain how is 2/3 = 0.816?
I didnt understand why we used z scores to calculate the correlation coefficient. Can someone explain?
Is the correlation coefficient r also known as the slope of the line of best fit? Or is line of best fit something else?
I think “best fit” is something called Regression line. The difference between r correlation and regression line is that regression line requires an explanatory and a response variable to be calculated. The r correlation don’t require those variables to be calculated. (I’ve only been taking ap stats for a couple months so I’m not sure if I’m entirely right) sorry for the late reply haha.
what is the e thing?
the cross bar is distractiong
Now if I'm being asked to test for hypothesis
I hope the math quiz gets delayed somehow
Simply explained
"I'm happy there are only 4 pairs here"... hahaha... Calculating repetitive stuffs manually can be tiring
I'm so confused tho because my professor gave a COMPLETELY different formula for correlation coefficient; r=(meanx)(Z score of y)
in the book they dont divide by n-1 for variance
it depends. for population, they use N. If they use sample, they use n-1
Ok I am confused that how he took out standard deviation of x ? Like HOW?!! SOMEONE HELP!!!
How did he get r=1/3
Why is r always between -1 and 1?
I know that this question has been asked before but the answers are either too technical or too naive. Could someone please provide an answer that is mathematical in nature but can be understood by someone who have ok but not strong mathematical foundation.
Thanks for your help.
-1 is the weakest correlation coefficient and 1 is the strongest correlation coefficient. Its like a rating of how strong/weak it is. I am a bit late though sorry.
@@benji4226 lol, a bit? Thanks though you just help me. I like reading comments. I saw a question before this that's 2 yrs old too but said to myself, "its too late to answer", then it hit me, someone else could benefit. Then I say you replying to a 2yr old question. What are the odds?
Oneila Nelson i answered the question just in case because, you never know.
yeah I give up I don't understand it
oh.
Didn’t he get the wrong answer because he forgot to add the 1 at 6:02
to confusing
r situation hahahahaah
Booooooooo, give us the black background
For last-minute, late-night studying XD
Might as well use dark theme 24/7 tho
This method gave me the wrong answer 💀
You just dumb ngl
not good honestly