SOLUTION: A set of X and Y scores has Mx=4, SSx=10, MY=5, SSY=40, and SP=40. What is the regression equation for predicting Y from X? a, =0.25X-4 b, =4X+4 c, =X-6 d, =4X-11 If ther

Algebra ->  Probability-and-statistics -> SOLUTION: A set of X and Y scores has Mx=4, SSx=10, MY=5, SSY=40, and SP=40. What is the regression equation for predicting Y from X? a, =0.25X-4 b, =4X+4 c, =X-6 d, =4X-11 If ther      Log On


   

Question 672219: A set of X and Y scores has Mx=4, SSx=10, MY=5, SSY=40, and SP=40. What is the
regression equation for predicting Y from X?
a, =0.25X-4
b, =4X+4
c, =X-6
d, =4X-11
If there is a negative correlation between X and Y then the regression equation, Y=bX+a
will have_____
a, b>0
b, b<0
c, a>0
d, a<0

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Mx=4,My=5, SSx=10,  SSy=40, and SP(Sum of Products) =40

Regression Line: y = bx + a

 b = SP/SSx = 40/10 = 4 

 a = My -bMx = 5 - 4•4 = -11

Regression Line is y+=+4x-11



negative correlation:  b < 0



Regression Line: y = bx + a

b =                                   

and a+=+m%5By%5D+-++b%2Am%5Bx%5D