A summary of the CRASH driver-side star ratings for the 98 cars in the file is reproduced in the accompanying Minitab printout. Assume that one of the 98 cars is selected at random and let x equal the number of stars in the car's driver-side star rating.

For Information: Refer to the NHTSA crash tests of new car models, Exercise 4.3.
a. Use the information in the printout to find the probability distribution for x.
b. Find P(x = 5).
c. Find P(x ‰¤ 2).
d. Find μ = E(x) and practically interpret the result.

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Tally for Discrete Variables: DRIVSTAR DRIVSTAR Count Percent 4.08 17 17.3s 4 59 60.20 18 18.37 3 5 N- 98