CÂU HỎI 18 (SINGLECHOICE)
Ý Đánh dấu
Based on extensive data from an urban freeway near Toronto, Canada, "it is assumed that free speeds can best be represented by a normal distribution" ("Impact of Driver
Compliance on the Safety and Operational Impacts of Freeway Variable Speed Limit Systems," J. of Transp. Engr., 2011: 260-268). The mean and standard deviation
reported in the article were 119 km/h and 13.1 km/h, respectively.
What is the probability that the speed of a randomly selected vehicle exceeds 120 km/h?
P(Z 1.45) 0.074, P(Z ≤ 0.08) = 0.532
0.074
0
0.532
0.468
