Actual Observationbegin{tabular}{|c|c|} hline 1 & 318.9 hline 2 & 255.1 hline 3 & 338.3 hline 4 & 348.5 hline 5 & 390.3 hline 6 & 369.7 hline 7 & 390.8 hline 8 & 476.0 hline 9 & 401.0 hline 10 & 416.1 hline 11 & 428.6 hline 12 & 441.4 hline 13 & 375.2 hline 14 & 468.3 hline 15 & 482.4 hline 16 & 496.8 hline 17 & 511.7 hline 18 & 527.1 hline 19 & 502.0 hline 20 & 598.1 hline 21 & 576.0 hline 22 & 593.3 hline 23 & 611:1 hline 24 & 629.4 hline 25 & 648.3 hline 26 & 726.2 hline 27 & hline 1nterept & 278.29 hline slope & 14.467 hline end{tabular} Actual Observation.