Independent random samples of sizesn1= 109andn2= 115were taken from two populations.In the first sample, 36 of the individuals met a certain criteria whereas in the second sample, 42 of the individuals met the same criteria.

a)What are the point estimates ofp1andp2, the true population proportion of individuals who meet this criteria in populations 1 and 2, respectivley?

p^1=

p^2=

b)Calculate the standard error of difference in sample proportions,SE(p^1p^2), for a 95% confidence interval for the difference in population proportions.

c)What is the margin of error for a 95% confidence interval for the difference in population proportions?