The National Highway Traffic Safety Administration requires each U.S. state to carry out an observational study to assess the level of seat belt use in the state. One report summarized data from a study done in a certain state. Unfortunately, the "sex" variable provided very little information, and only indicated that it collected the values Female and Male; it may be that this refers to the gender identity of the respondent. The proportions in the accompanying table are based on observations of over 25,000 drivers and passengers. Male Female Uses Seatbelt 0.422 0.452 Does Not Use Seat Belt 0.078 0.048 Assume that these proportions are representative of adults in this state and that an adult from this state is selected at random. (a) What is the probability that the selected adult uses seat belt? (b) What is the probability that the selected adult uses a seat belt given that the individual selected is male?

MATLAB: An Introduction with Applications
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The National Highway Traffic Safety Administration requires each U.S. state to carry out an observational study to assess the level of seat belt use in the state. One report
summarized data from a study done in a certain state. Unfortunately, the "sex" variable provided very little information, and only indicated that it collected the values Female
and Male; it may be that this refers to the gender identity of the respondent. The proportions in the accompanying table are based on observations of over 25,000 drivers and
passengers.
Male
Female
Uses Seatbelt
0.422
0.452
Does Not Use Seat Belt
0.078
0.048
Assume that these proportions are representative of adults in this state and that an adult from this state is selected at random.
(a) What is the probability that the selected adult uses a seat belt?
(b) What is the probability that the selected adult uses a seat belt given that the individual selected is male?
Transcribed Image Text:The National Highway Traffic Safety Administration requires each U.S. state to carry out an observational study to assess the level of seat belt use in the state. One report summarized data from a study done in a certain state. Unfortunately, the "sex" variable provided very little information, and only indicated that it collected the values Female and Male; it may be that this refers to the gender identity of the respondent. The proportions in the accompanying table are based on observations of over 25,000 drivers and passengers. Male Female Uses Seatbelt 0.422 0.452 Does Not Use Seat Belt 0.078 0.048 Assume that these proportions are representative of adults in this state and that an adult from this state is selected at random. (a) What is the probability that the selected adult uses a seat belt? (b) What is the probability that the selected adult uses a seat belt given that the individual selected is male?
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