In a national survey colege students were asked, How often do you wear a seat be

Question

In a national survey colege 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 rigt. (a) Construct a probability model for seat belt use by a passenger (b) Would you consider it unusual to find a colege student who never wears a seat belt when riding in a car driven by someone else? (a)Complete the table below. (Round to the nearest thousandth as needed (Round to the nearest thousandah as needed Round to the nearest thousandth Most of the time (Round to the nearest theusandh as needed (Round to the nearest thousandhh as needed) you consider itunusual to find a colege student who never wears aseatbeh when riding in a car driven by someone else? Woud OA No became these were 113 people in the survey whos d they erre wear the seat beh B Yes, because 001 Prevery 10 O c No because the probabiny of an unusual event is Response Freq engo Most ofthe time 1011

Explanation / Answer

Ans:1)

Option D is correct.(Yes ,beacuse probability of never using seat belt is less than 0.05.)

2)F or G={6,7,8,9,10}

There are 5 favourable outcomes for F or G event.

Overall possible outcomes=12

So,P(F or G)=5/12

or general solution rule:

P(F or G)=P(F)+P(G)-P(F and G)

P(F or G)=(3/12)+(2/12)-0=5/12

frequency(fi) Probability(fi/4571) Never 113 0.024721 rarely 301 0.06585 sometimes 557 0.121855 most of the time 1011 0.221177 always 2589 0.566397 total(N) 4571 1

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