NHTSA crash tests. Refer to the National Highway Traffic Safety Administration (NHTSA) crash tests of new car models, Exercise 2.149 (p. 116). Recall that the NHTSA developed a driver-side “star” scoring system, with results ranging from one star (*) to five stars (*****). The more stars in the rating, the better the level of crash protection in a head-on collision. Suppose that a car is selected from the data 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?
Step 1 of 2:
It is given that National Highway Traffic Safety Administration developed a driver side ‘star’ rating system in which the stars to be awarded ranges from one star to five stars.
The random variable x denotes the number of stars in the ratings.
We have to identify whether x is continuous or discrete.