For questions 12 und 13 t is kmown that the nean diameter of pine trees in...
For questions 12 und 13 t is kmown that the nean diameter of pine trees in a national forest is 9.6 (inches) with a standard deviation 2A (inches). Assuming that the treediameters are distributed normally. 12 If a pine tree is to be selected randomly from this forest, what is the probability that 24L its diameter will fall betweern 72 nches and 14.5inches? (a) .1359 (b) 6826 (c) 9544 (d) 8185 (e) 9772-0. 834 2 If a selected pine tree from this forest is at the 90th percentile, what is its diameter (rounded off to two decimal places) in inches? (a) 12.67 (b) 14.30 (c) 13.55 (d) 14.69 (e) 18.19 13