Need help with statistics - frequency distributions!

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.) Click the icon to view the frequency distributions. Complete the relative frequency table below. Relative Relative Frequency Frequency - X Tar (mg) (Nonfiltered) Filtered) Frequency Distributions 3-6 9% 7 - 10 11 - 14 96 96 Tar (mg) in Tar (mg) in 15 - 18 Nonfiltered Filtered 19 - 22 Cigarettes Frequency Cigarettes Frequency 11 - 14 3 -6 23 - 26 15 - 18 7 - 10 27 - 30 19 -22 11 -14 23 - 26 15 - 18 Simplify your answers. 27 - 30 Do cigarette filters appear to be effective? A. No. because the relative frequency of the higher tar classes is greater for filtered cigarettes. OB. No. because the relative frequencies for each are not substantially different. Print Done ) C. Yes, because the relative frequency of the higher tar classes is greater for nonfiltered cigarettes. D. This cannot be determined