Does this data represent a linear association between group A and group B using ...

       Number A B   1 16 180   2 27 240   3 30 385   4 21 200   5 33 350   6 12 150   7 18 210   8 23 450   9 45 650   10 39 590   11 50 725   12 45 630   13 34 440   14 29 355   15 58 635   16 41 580   17 36 340   18 15 175   19 43 545   20 28 246        1   Does this data represent a linear association between group A and group B   using 0.05 error level? Do interpret your results.         2 Find the   least-squares regression line relating group B to group A. Find estimated   values   of the coefficients for the   intercept and the slope and write the interpretation for each estimate         3 For the   above data, you need to provide the coefficient of determination of this   least-squares regression line with its corresponding interpretation         4)Using   the above regression results, what would be the estimated   group B for a corresponding   group A = 345 (X) and establish a 95% confidence interval for the predicted   true mean         5) Do   explain your diagnosis analysis of the residuals of this least squares   regression line.