Two random samples are selected to test if there is a difference in two population proportions with a = 0.05 level. The results are, 
, n 1 =50, 
, and n 2 = 40. Use this data to answer problems 6 through 10.
In a taste test using two colas, a random sample of 30 males and 30 females were selected. 18 males and 24 of the females chose brand A. A test is conducted to determine if the population proportion of females for brand A is greater than the population proportion for males. Use this data for questions 11 through 14.