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# Find correlation coefficient?

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?

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engineer

1
Thu 12 May, 2011 06:38 am
@daivinhtran,
Try here.
daivinhtran

1
Thu 12 May, 2011 05:44 pm
@engineer,
It's high school math

In what you give me, it's too rough to understand.
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JPB

1
Thu 12 May, 2011 06:27 pm
@daivinhtran,
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.
daivinhtran

1
Sat 14 May, 2011 09:46 am
@JPB,
thank you, so much
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