Question 2) 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................

e) Is the following interpretation for part c and d are true or false: We have 95 percent confidence that the true proportions of smoker for men is between .226 and .3136. Also, there is 95 % confidence that the true proportion of smoker for women is between .153 and .231.

1.False

2.True

f) What is a 90 percent confidence interval for the difference between the proportion populations for smoker? (Use p1 - p2 +/- Z 1-alpha/2 ( find Z value from Z table) * square root of P1* (1-.p1)/ n1 + P2 * (1-P2)/n2). Use P1= .2698 and P2 =.1921 four digit to get exact value. Otherwise, yours would be a little off)

1. .03 and .13

2. .10 and .40

3. .20 and .43

4..05 and .50