9.73 An urn contains 0 black balls and N 0 white balls. A sample of n balls is

9.73 An urn contains 0 black balls and N 0 white balls. A sample of n balls is to be selected without replacement. Let Y denote the number of black balls in the sample. Show that (N/n)Yis the method of moments estimator for 0.9.87 A random sample of 100 voters selected from a large population revealed 30 favoring candidate A 38 favoring candidate B and 32 favoring candidate C. Find MLEs for the proportions of voters in the population favoring candidates A B and C respectively. Estimate the difference between the franctions favoring A and B and place a 2-standard-deviation bound on the error of estimation.