Question

During routine physical exams, physicians give advice to their patients encouraging them to stop smoking, is this advice effective? In a study of current smokers, the treatment group (Group 1) was given a talk about the hazards of smoking and encouraged to quit. Out of the 117 smokers, 11 reported quitting smoking. The control group (Group 2) was given no advice or encouragement to quit smoking, 7 out of the 96 smokers reported quitting smoking. Testing if the advice was effective (a larger proportion of smokers who received the advice quite smoking) at a 0.10 level of significance yields a test statistic of 0.55. Determine the critical value for the test. Round to 2 decimal places.

Answer 1