Suppose you are conducting a test of significance in the following situations. For each of these, determine whether you should conduct a one-proportion z-test or a two-proportion z-test. 

a. You want to test to see which cereal people prefer in a blind taste test, a name brand or a store brand. You find that 56% of your sample prefers the name brand and 44% prefer the store brand. 

b. You want to test to see whether males and females differ in which cereal they prefer (name brand or store brand) in a taste test. You find that 62% of the females prefer the name brand and 58% of the males prefer the name brand.