Question

In 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 Frequency Frequency Never 113 113 Rarely 324 324 Sometimes 533 533 Most of the time 1388 1388 Always 2760 a) Complete the table below. Response Probability Never nothing

Answer 1

response	Frequency
Never	113
rarely	324
sometimes	533
most of times	1388
always	2760
total	5118

a)

dividing each cell frequency with 5118 ; below is the probability model:

response	Frequency
Never	0.0221
rarely	0.0633
sometimes	0.1041
most of times	0.2712
always	0.5393

b)

as probability of finding 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 an unusual event,