On a monthly basis, accidents were occurring at two intersections (A and B) at similar rates. Traffic control measures were taken at one of the two intersections (A), and then monthly accidents were recorded at both intersections for a 2-year period. Compute appropriate statistics and make graphical analyses to characterize the difference in accident rates (B – A) at the two sites. The accident counts are A = {2,0,4,3,0,1,0,4,2,1,2,2,3,0,1,5,4,2,0,2,3,1,6,1}
B = {5,2,8,11,7,8,5,10,6,8,9,4,6,12,7,7,10,11,6,8,13,11,7,9}