NHTSA crash tests. Refer to the National Highway Traffic Safety Administration (NHTSA) crash tests of new car models, presented in Exercise 4.6

(p. 216). A summary of the driver-side star ratings for the 69 cars is reproduced in the MINITAB printout in the next column.

Assume that 1 of the 69 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 P1x = 32.

c. Find P1x 6 42.

Transcribed Image Text:

MINITAB Output for Exercise 4.26 Tally for Discrete Variables: DRIVSTAR DRIVSTAR Count Percent 2 10 14.49 3 15 21.74 4 26 37.68 5 18 26.09 N= 69