Question

construct one table that includes relative frequencies based on the frequency distributions shown be 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.) do cigarette filters appear to be effective? a. yes, because the relative frequency of the higher tar classes is greater for nonfiltered cigarettes b. no, because the relative frequency of the higher tar classes is greater for filtered cigarettes. c. no, because the relative frequencies for each are not substantially different. d. this cannot be determined.

Explanation:

Step1: Analyze relative frequencies

We observe the relative - frequency table. For non - filtered cigarettes, higher tar classes (21 - 26, 27 - 32) have significant relative frequencies. For filtered cigarettes, the relative frequencies in higher tar classes are different.

Step2: Evaluate effectiveness

If the relative frequency of higher tar classes is greater for non - filtered cigarettes, it implies that filters are reducing the amount of tar inhaled, so they are effective.

Answer:

A. Yes, because the relative frequency of the higher tar classes is greater for nonfiltered cigarettes.