2. Consider data arising from a 5-year study reported in 1988 by the US Physicians' Health Study Research Group. Over 22,000 male physicians, in the age range 4084, were randomly allocated a course of either aspirin or placebo over 5 years; tablets taken every two days. None of the physicians knew which tablet they were taking. The results are summarised: Treatment Heart Attack No Heart Attack ' Total Aspirin 104 10933 11037 Placebo 189 10845 11034 293 21778 ' 22071 Using a chi-squared test for association (see handout), perform a test to ascertain whether there is evidence to reject the hypothesis that taking aspirin is independent of having a heart attack, for the Physician's Health Study data. In particular