b. Find two lines of regression from the following data

Steps :

1. assume mean
2. dx=x-(assumed mean of x) , dy= y – (assumed mean of y )
3. prepare an table and calculate summations of
   x , y , dx , dy , dx^2 , dy^2 , dxdy
4. Now calculate mean of x and y
   x mean = Σx/n and y mean = Σy/n
5. Now find regression coefficients bxy , byx
   
6. Calculate regression lines
   y on x
   y – ymean= byx(x- xmean)
   x on y
   x- xmean = bxy(y-ymean)
7. Now solve the question by putting in the equation