QUESTION IMAGE
Question
construct one table that includes relative frequencies based on the frequency distributions shown below, then compare the amounts of tar in non - filtered and filtered cigarettes. do the cigarette filters appear to be effective? (hint: the filters reduce the amount of tar ingested by the smoker.)
click the icon to view the frequency distributions.
complete the following relative frequency table.
(round to the nearest percent as needed.)
| tar (mg) | relative frequency (nonfiltered) | relative frequency (filtered) |
|---|---|---|
| 10 - 14 | % | % |
| 15 - 19 | % | % |
| 20 - 24 | % | % |
| 25 - 29 | % | % |
| 30 - 34 | % | % |
| 35 - 39 | % | % |
frequency distributions
| tar (mg) in nonfiltered cigarettes | frequency | tar (mg) in filtered cigarettes | frequency |
|---|---|---|---|
| 20 - 24 | 0 | 10 - 14 | 1 |
| 25 - 29 | 13 | 15 - 19 | 5 |
| 30 - 34 | 7 | 20 - 24 | 18 |
| 35 - 39 | 3 |
Step1: Calculate total frequency for non - filtered cigarettes
Add up the frequencies of non - filtered cigarettes: $2 + 0+13 + 7+3=25$.
Step2: Calculate relative frequencies for non - filtered cigarettes
For the $15 - 19$ range: $\frac{2}{25}\times100\% = 8\%$.
For the $20 - 24$ range: $\frac{0}{25}\times100\% = 0\%$.
For the $25 - 29$ range: $\frac{13}{25}\times100\% = 52\%$.
For the $30 - 34$ range: $\frac{7}{25}\times100\% = 28\%$.
For the $35 - 39$ range: $\frac{3}{25}\times100\% = 12\%$.
Step3: Calculate total frequency for filtered cigarettes
Add up the frequencies of filtered cigarettes: $1+1 + 5+18=25$.
Step4: Calculate relative frequencies for filtered cigarettes
For the $5 - 9$ range: $\frac{1}{25}\times100\% = 4\%$.
For the $10 - 14$ range: $\frac{1}{25}\times100\% = 4\%$.
For the $15 - 19$ range: $\frac{5}{25}\times100\% = 20\%$.
For the $20 - 24$ range: $\frac{18}{25}\times100\% = 72\%$.
| Tar (mg) | Relative Frequency (Non - filtered) | Relative Frequency (Filtered) |
|---|---|---|
| $10 - 14$ | 0% | 4% |
| $15 - 19$ | 8% | 20% |
| $20 - 24$ | 0% | 72% |
| $25 - 29$ | 52% | 0% |
| $30 - 34$ | 28% | 0% |
| $35 - 39$ | 12% | 0% |
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| Tar (mg) | Relative Frequency (Non - filtered) | Relative Frequency (Filtered) |
|---|---|---|
| $10 - 14$ | 0% | 4% |
| $15 - 19$ | 8% | 20% |
| $20 - 24$ | 0% | 72% |
| $25 - 29$ | 52% | 0% |
| $30 - 34$ | 28% | 0% |
| $35 - 39$ | 12% | 0% |