You are concerned that the incidence of smoking is increasing among young

Quiz 3

OPMT 1197 Quiz 3

 

You are concerned that the incidence of smoking is increasing among young people. You create the table below that shows student ages in the columns and smokers or non-smokers in the rows.

 

Ages

 

18 – 24

25 – 29

30 – 34

Total

 

Non-smoker

96

63

10

169

 

Smoker

24

7

0

31

 

Total

120

70

10

200

 

(a) Overall, what percentage of students smoke? [3 mark]

ANSWER (Percentage, 2 decimal places):

(b) What percentage of 18 to 24 year olds smoke? [3 marks]

ANSWER (Percentage, 2 decimal places):

(c) If a student is 25 years or older, what is the probability he/she is a non-smoker? [3]

ANSWER (4 decimal places):

(d) If a student smokes, what is the probability he/she is under age 30? [3 marks]

 

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