(a) We wish to estimate the proportion of the female population (16 years and older) with Rh negative blood in a given city. Suppose 900 women are typed and 90 are Rh negative. Find a 95% confidence...

(a) We wish to estimate the proportion of the female population

(16 years and older) with Rh negative blood in a given city.

Suppose 900 women are typed and 90 are Rh negative. Find

a 95% confidence interval for p.

(b) Find the minimum required sample size to estimate p with

a maximum error of 0.005 if it can be assumed that p ~ 0.2.

Let 1 - a. = 0.98.