Consider the grouped data analysis for the number of cigarettes consumers smoke weekly

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Consider the grouped data analysis for the number of cigarettes consumers smoke weekly.

Classes                               frequency

1 - 5                                   10

6 - 10                                11

11 - 15                               7

16 - 20                               4

21 - 25                               2

What is the distribution of the number of cigarettes smoked weekly?  What does it tell you?

(8)If we are to randomly select a smoker, what is the probability that the smoker will smoke at most 10 cigarettes a week?