Find correlation coefficient?

Reply Wed 11 May, 2011 06:48 pm
the least squares best fit line for the number of years in college X and the income level Y is Y=11.9+ 3.46X

Given that the standard errors of X and Y are Sx=1.8 and Sy = 7.2, what is the correlation coefficient?

Give me the explaination, please
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Reply Thu 12 May, 2011 06:38 am
Try here.
Reply Thu 12 May, 2011 05:44 pm
It's high school math

In what you give me, it's too rough to understand.
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Reply Thu 12 May, 2011 06:27 pm
The correlation coefficient relates directly to the regression line Y=bX+a for any two variables X and Y, where b=r(Sy/Sx). You have b in your linear equation. You have Sy and Sx in your problem information. Substitute b, Sy, and Sx in the formula above and solve for r.
Reply Sat 14 May, 2011 09:46 am
thank you, so much
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