In the 1970's PepsiCo, makers of Pepsi, began airing commercials in which they claimed more cola drinkers preferred Pepsi over Coca-Cola in a blind taste test. Assume Pepsi's claim is that more than 50% of cola drinkers prefer Pepsi.You work for an independent research firm and are asked to test Pepsi's claim.

1. Identify the null and alternative hypotheses and tell where Pepsi's claim is.
2. If 280 people from of a sample of 500 prefer Pepsi-Find the P-Value and compare it to alpha = .05.Will you reject or fail to reject the null?
3. Interpret your decision in the correct context of the problem. Is there enough evidence to support Pepsi's claim?
4. Why do you think Pepsi used a blind taste test?