NHTSA car crash tests. Refer to Exercise 4.26 (p. 221), in which you found the probability distribution

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NHTSA car crash tests. Refer to Exercise 4.26

(p. 221), in which you found the probability distribution for x, the number of stars in a randomly selected car’s driver-side crash rating. Find m = E1x2 for this distribution and interpret the result practically.

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