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Question: 3 the stemandleaf plot shows the number of cigarettes per...

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3          The stem-and-leaf plot shows the number of cigarettes per day previously smoked by the participants of a quit smoking program.

 

Stem

Leaf

0

3  7

1

5

2

2  2  3  9

3

5  6  7 

4

0  2

 

 

 

 

 

 

 

 

 

a)            How many people took part in the program?

b)            What percentage of the participants in this program, previously smoked more than 20 cigarettes per day?

 

c)             For this data find the:

i)      median number of cigarettes smoked by these participants.

 

                        ii)   interquartile range of cigarettes smoked by these participants.

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