Opmt 1197 quiz 3 | quiz 3- opmt-1197-ne2 – stats for

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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