The following table shows crashworthiness ratings for 16 cars. (3 Good, 2 :: Acc

Question

The following table shows crashworthiness ratings for 16 cars. (3 Good, 2 :: Acceptable, 1 Marginal, o-Poor) Frontal Crash Test Rating 3 1 0 Frequency | | 1212 (a) Find the relative frequency distribution for the experiment of choosing a car at random and determining its frontal crash rating. (Enter your answers to four decimal places.) Good (3) Acceptable (2) Marginal (1) Poor (0) (b) What is the relative frequency that a randomly selected car will have a crash test rating of "Marginal" or worse? (Enter your answer to four decimal places.) Need Help? L Read it

Explanation / Answer

Total frequency = 16
a)
Good = 1/16 = 0.0625
Acceptable = 12/16 = 0.75
Marginal = 2/16 = 0.125
Poor = 1/16 = 0.0625

b)
Relative frequency = marginal + worse(poor)
= 0.125 + 0.0625
= 0.1875

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