10.23 Find the test statistic and do the two-sample test for equality of proportions. a. Repeat buyers at two car dealerships: p, = .30. n, = 50, p, = .54, n, = 50, a =.01, left-tailed test. b. Honor roll students in two sororities: p, = .45, n, = 80, p, = .25, n, = 48, a = .10, two-tailed test. c. First-time Hawaii visitors at two hotels: p, = .20, n, = 80. p, = .32. n, = 75, a = .05, left-tailed test