A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
how to find correlation coeff in statistics???
anonymous
 5 years ago
how to find correlation coeff in statistics???

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Do you know the definition and can't use it, or is it the case you don't even have the definition?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The population correlation coefficient is defined as\[\rho_{X,Y}=\frac{cov(X,Y)}{\sigma_X \sigma_y}=\frac{E[(X\mu_X)(Y\mu_Y)]}{\sigma_X \sigma_Y}\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The sample correlation coefficient is\[r=\frac{\sum_{i=1}^{n}(X_im_X)(Y_im_Y)}{\sqrt{\sum_{i=1}^{n}(X_im_X)^2}\sqrt{\sum_{i=1}^{n}(Y_im_Y)^2}}\]where \[m_X,m_Y\]are the *sample* means, and \[X_i,Y_i\]are your paired data points.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Follow this example: http://www.youtube.com/watch?v=pBK6L7lJwwE

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0He's using a different formula at the end, though it's actually derived from what I gave you above. Follow his method for your own data.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I'm kind of busy right now, so I'm not able to go into it in much more detail at the moment, but if you need more help, let me know. It's not a hard thing to do (calculate the coefficient), just a pain to do online in this forum.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.