Discuss the below:
Assume the condition of Normality is met for problem below.
Q: A study is made of men over the age of 50. Each man is classified as to whether or not he has had a heart attack and the amount that he smokes at the present time. The following results were obtained for a sample of 300 men.
Heart Attack
Amount smoked Yes No
None 50 150
Moderate 45 30
Heavy 15 10
At .05 significance level, is there a difference in the distribution of heart attacks based on the amount smoked?