題組內容

II. The significance level is 0.05 for all questions in II unless otherwise specified.

1. (10%) A market research firm estimates the proportion of adults in a city who have tablets, and they believe more than half of the adults in this city have tablets. A confidence interval for the population proportion of adults have tablets from a random sample of 400 adults is constructed. The lower limit is 0.5597 and the upper limit is 0.6403.

(2) \( (5\%) \) If another random sample of 400 adults is taken, and 218 adults have tablets. To test the hypothesis if more than half of the adults in the city have tablets, what is the P-value and your conclusion?