Question

The following contingency table represents a study to determine if a new drug is effective in treating lower back pain. Participants were asked their pain levels two weeks after taking the two different treatments.

	drug	placebo
no pain	36	12
moderate pain	131	194
high pain	82	157

a) How many of the patients had no pain or took the drug?

b) What percent of the patients had a high pain level?

c) What percent of the patients who took the drug, had no pain?

d) What percent of the patients both took the placebo and had moderate pain?

Answer 1

4 nino pain or deus) = I Amo paint ndrrug n both) 4 8 t 249 - 3 G 126 2 Pl high level pain) 89 EIS2 61 g 10.3905) 39.05.1, 31 PL mo pain I duug) = pimo pain n dung) pl drug) 36 249 10.144 6 14.46 1: PL placebo n moderate pain ! 194 61 ) 31.70) .. CS Scanned with CamScanner