Section 2.1 Homework 

6. 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. Do the cigarette filters appear to be​ effective? (Hint: The filters reduce the amount of tar ingested by the​ smoker.)

Do cigarette filters appear to be​ effective?

1. No, because the relative frequency of the higher tar classes is greater for filtered cigarettes.
2. Yes, because the relative frequency of the higher tar classes is greater for nonfiltered cigarettes.
3. No, because the relative frequencies for each are not substantially different.
4. This cannot be determined.