n a national survey college students were asked, \"How often do you wear a seat
ID: 3300898 • Letter: N
Question
n a national survey college students were asked, "How often do you wear a seat belt when riding in a car driven by someone else?" The response frequencies appear in the table to the right. (a) Construct a probability model for seat-belt use by a passenger. (b) Would you consider it unusual to find a college student who never wears a seat belt when riding in a car driven by someone else?
Response
FrequencyFrequency
Never
122
Rarely
339
Sometimes
580
Most of the time
1145
Always
2513
(a) Complete the table below.
Response
Probability
Never
nothing
(Round to the nearest thousandth as needed.)
Rarely
nothing
(Round to the nearest thousandth as needed.)
Sometimes
nothing
(Round to the nearest thousandth as needed.)
Most of the time
nothing
(Round to the nearest thousandth as needed.)
Always
nothing
(Round to the nearest thousandth as needed.)
n a national survey college students were asked, "How often do you wear a seat belt when riding in a car driven by someone else?" The response frequencies appear in the table to the right. (a) Construct a probability model for seat-belt use by a passenger. (b) Would you consider it unusual to find a college student who never wears a seat belt when riding in a car driven by someone else?
Response
FrequencyFrequency
Never
122
Rarely
339
Sometimes
580
Most of the time
1145
Always
2513
Explanation / Answer
from above total frequency =4699
as probability =frequency/total frequency
hence)
a)
b)
as probability to find a college student who never wears a seat belt when riding in a car driven by someone else is less then 0.05 ; therefore it is considered unusual.
Response Frequency Never 0.026 Rarely 0.072 Sometimes 0.123 Most of the time 0.244 Always 0.535Related Questions
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