Corsthuct one tabie Phat includes welative freouencies baned

Corsthuct one tabie Phat includes welative freouencies baned on the treqgancy datiitions shoan blowtcompare the amounts of tar in nondihored and fitered cigaretos De the cgurette fiters appeur to be offoctive? int The filters neduce the amount of tar ingested by the smoker Click the Kon to vew the hoqungy dstham 8- 12 Tar (mg) n Fitered Nonditered 18-22 23-27 2-32 18-22 23-27 28.32 33-37 8-12 13-17 18-22 13 33-37 18 15 Simplity your answers) Do cigwethe filers appear to be effecve? O D. This camot be determined Cick to select your answers

Solution

Following is the completed relative frequency table:

Option A is correct.

Interval	Frequency (Non filtered Cigarettes	Frequency (Filtered Cigarettes	Relative Frequency (Non filtered Cigarettes	Relative Frequency (Filtered Cigarettes
3-7		3	0%	((3*100)/25)=12%
8-12		1	0%	((1*100)/25)=4%
13-17	1	6	((1*100)/25)=4%	((6*100)/25)=24%
18-22	1	15	((1*100)/25)=4%	((15*100)/25)=60%
23-27	13		((13*100)/25)=52%
28-32	7		((7*100)/25)=28%
33-37	3		((3*100)/25)=12%
Total	25	25	100%	100%