A1 5 event that a randomly selected individual is in age group 18–24, and A6 5 event that a randomly selected individual is in age group 65 and older.

a. Convert the counts to proportions and then use them to compute the following probabilities:

i. PsA1 d ii. PsA1 > Sd iii. PsA1uSd iv. Psnot A1 d v. PsSuA1 d vi. PsSuA6 d

b. Using the probabilities PsSuA1 d and PsSuA6 d computed in Part (a), comment on how 18–24-yearolds and seniors differ with respect to seat belt usage.