4. A medical study of females reported whether or not each participant smoked and whether or not each participant had a heart attack. The results for the 216 females in the study are reported in the following table. Use this data to test the hypothesis that there is no association between whether a female smokes and whether she had a heart attack. Heart Attack Smoker Yes No Total Yes 45 83 128 No 14 74 88 Total 59 157 216 What do I know? What do I want to find out? How do I go from what I know to what I want to find