NHTSA crash tests. Refer to the National Highway Traffic Safety Administration (NHTSA) crash… 1 answer below »
NHTSA crash tests. Refer to the National Highway Traffic Safety Administration (NHTSA) crash tests of new car models, presented in Exercise 4.6 (p. 183). A summary of the driver-side star ratings for the 98 cars in the CRASH file is reproduced in the accompanying MINITAB printout. Assume that 1 of the 98 cars is selected at random, and let x equal the number of stars in the car’s driver-side star rating.
a. Use the information in the printout to find the probability distribution for x.
b. Find P(x = 5).
c. Find P(x≤ 2).
Exercise 4.6
NHTSA crash tests. The National Highway Traffic Safety Administration (NHTSA) has developed a driver-side “star” scoring system for crash-testing new cars. Each crash-tested car is given a rating ranging from one star (*) to five stars (*****): the more stars in the rating, the better is the level of crash protection in a head-on collision. Suppose that a car is selected and its driver side star rating is determined. Let x equal the number of stars in the rating. Is x a discrete or continuous random variable?
