Refer to the National Highway Traffic Safety Administration (NHTSA) crash tests of new car models, presented in Exercise 4.6 (p. 188). A summary of the driver-side star ratings for the 98 cars is reproduced in the MINITAB printout in the next column. 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.
Rating Count Percent
2 5 5.10
3 16 16.33
4 54 55.10
5 23 23.47
N=98
a. Use the information in the printout to find the probability distribution for x.
b. Find P1x = 52.
c. Find P1x ... 22.
NHTSA crash tests. Refer to the National Highway Traffic Safety Administration (NHTSA) crash tests of new car models, presented in Exercise. 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...
In 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. A summary of the driver-side star ratings for 98 cars is reproduced in the accompanying table. Assume that 1 of the 98 cars is selected at random, and let x equal the number of stars in the car's...
In 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. A summary of thedriver-side star ratings for 98 cars is reproduced in the accompanying table. Assume that 1 of the 98 cars is selected at random, and let x equal the number of stars in thecar's driver-side star...