find the linear correlation coefficient r for the following

find the linear correlation coefficient r for the following:

x: 1, 3, 5, 8, 9

y: 4, 2, 6, 6, 7

Solution

r( X,Y) =    Co V ( X,Y) / S.D (X) * S.D (y)                      
r( X,Y) =    Sum(XY) / N- Mean of (X) * Mean of (Y) / Sqrt( X^2/n - ( Mean of X)^2 ) Sqrt( Y^2/n - ( Mean of Y)^2 )                        
                          
Co v ( X, Y ) =   1 /5 (151) - [ 1/5 *26 ] [ 1/5 *25] =            4.2          
S. D ( X ) =   Sqrt( 1/5*180-(1/5*26)^2)           2.993          
S .D (Y) =    Sqrt( 1/5*141-(1/5*25)^2)           1.789          
r(x,y) =    4.2 / 2.993*1.789   =   0.7844              
                          
If r = 0.7844> 0 ,Perfect Positive Correlation                          
                          
Coeffcient of determination = r^2 = 0.6153

[ANSWER] r = 0.7844   

Correlation
( X) ( Y) X^2 Y^2 X*Y
1 4 1 16 4
3 2 9 4 6
5 6 25 36 30
8 6 64 36 48
9 7 81 49 63
0 0 0
26 25 180 141 151 Totals
find the linear correlation coefficient r for the following: x: 1, 3, 5, 8, 9 y: 4, 2, 6, 6, 7Solutionr( X,Y) = Co V ( X,Y) / S.D (X) * S.D (y) r( X,Y) = Sum(XY

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