Construct one table that includes relative frequencies based on the frequency di

Question

Construct one table that includes relative frequencies based on the frequency distributions shown below, then compare the amounts of tar in nonfiltered and filtered cigarettes my main question is that where do you get the frequencies for each class?because it is not given everything else is the same as the questions here I need help tonight;solve the whole thing so I can enter the answers please

Tar

2-6

7-11

12-16

17-21

22-26

27-31

32-36

Tar (mg)    Frequency     
nonfiltered freq          filtered freq
14–19   1           2–7   1
20–25   2         8–13   3
26–31   15       14–19   7
32–37   6                20–25   14
38–43   1       

Explanation / Answer

Following table shows the requried table:

Yes filter seems to be effective because tar is less for filtered cigarettes is higher classes.

Frequency , f Relative frequency (%),( f/25 )*100 Tar nonfiltered filtered nonfiltered filtered 2-7 0 1 0 4 8-13 0 3 0 12 14-19 1 7 4 28 20-25 2 14 8 56 26-31 15 0 60 0 32-37 6 0 24 0 38-43 1 0 4 0 Total 25 25 100 100

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