申論題

5. (15 points in total) Random samples of 900 people in the United States and in Great Britain indicated that 60% of the people in the United States were positive about the future economy, whereas 66% of the people in Great Britain were positive about the future economy.

(1) Carefully explain what is meant by the p-value of a test, and discuss the use of this concept in hypothesis testing. (5 points)