Mathematics, 21.02.2020 03:00 nessross1018
A simple random sample of 10 paired values (x, y) yields the following statistical calculations: ∑x=108, ∑y=138, ∑(x2) =1249, ∑(y2) =2280, ∑(xy) =1676. What is the linear correlation coefficient?
Answers: 1
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and 
![$r=\frac{n\left(\sum x y\right)-\left(\sum x\right)(\Sigma y)}{\sqrt{\left[n \sum x^{2}-\left(\sum x\right)^{2}\right]\left[n \Sigma y^{2}-(\Sigma y)^{2}\right]}}$](/tpl/images/0518/6965/2cd24.png)
![$r=\frac{10(1676)-(108)(138)}{\sqrt{\left[10(1249)-(108)^{2}\right]\left[10(2280)-(138)^{2}\right]}}$](/tpl/images/0518/6965/00c20.png)
![$r=\frac{16760-14904}{\sqrt{\left[12490-11664\right]\left[22800-19044\right]}}$](/tpl/images/0518/6965/87afc.png)
![$r=\frac{1856}{\sqrt{\left[826\right]\left[3756\right]}}$](/tpl/images/0518/6965/4d102.png)
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A simple random sample of 10 paired values (x, y) yields the following statistical calculations: ∑x=...
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