N, RMSE, Max 5,0.25243,0.39539 6,0.21201,0.51298 7,0.088724,0.21767 8,0.066164,0.20886 9,0.050573,0.1349 10,0.038739,0.11936 11,0.030841,0.08184 12,0.022897,0.069543 13,0.016971,0.04806 14,0.01336,0.039259 15,0.01057,0.028248