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Get Full Access to Statistics For Business And Economics - 12 Edition - Chapter 4 - Problem 3e
Get Full Access to Statistics For Business And Economics - 12 Edition - Chapter 4 - Problem 3e

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# NHTSA crash tests. Refer to the National Highway Traffic

ISBN: 9780321826237 51

## Solution for problem 3E Chapter 4

Statistics for Business and Economics | 12th Edition

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Problem 3E

Problem 3E

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-by-Step Solution:

Solution:

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.

Step 2 of 2

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