1)The table summarizes the results from an observational study that followed a random sample of 8,474 people for about four years. All participants were free from heart disease at the beginning of the study. The variable Anger categorizes participants as Low Anger, Moderate Anger, High Anger based on the Speilberger Trait Anger Scale test, which measures how prone a person is to sudden feelings of anger. CHD stands for coronary heart disease, which is a count of the people who had heart attacks or needed medical attention for heart disease during the study.

Low Anger Moderate Anger High anger Total

CHD 53 110 27 190

No CHD 3057 4621 606 8284

Total 3110 4731 633 8474

Does this data suggest that there is an association between anger and heart disease?

a)Identify the explanatory and response variables to inform how you construct your fractions for comparison.

b)What is the risk of CHD with low anger?

c)What is the risk of CHD with high anger?

d)Use the method of your choice to compare the likelihood that a High Anger person has CHD to a Low Anger person. Write a sentence to communicate your results.