Question: In a survey to identify of risk factors for heart disease among men and women were asked about if they ever smoke. Of the 430 men, 116 said they smoke. Of the 380 women, 73 said they smoke.

a) Calculate the proportion for smoker for men and women

b) Construct a 95 percent confidence interval for the proportion smoker for men and women

c) Construct a 90 percent confidence interval for the difference between the proportion populations for smoker.

d) Can we conclude that the men who smoke have higher proportion than women? Let Alpha=.05.

e) Interpret the results