Calculate the margin of error and construct a confidence interval for the population proportion using the normal approximation to thepp-distribution (if it is appropriate to do so).

Standard Normal Distribution Table

a.p=0.85,n=120,=0.05p=0.85,n=120,=0.05

E=?

Round to four decimal places if necessary

Enter 0 if normal approximation cannot be used

Round to four decimal places if necessary

Enter 0 if normal approximation cannot be used

b.p=0.45,n=160,=0.05

E=?

Round to four decimal places if necessary

Enter 0 if normal approximation cannot be used

Round to four decimal places if necessary

Enter 0 if normal approximation cannot be used