The Umbrella Corporation conducted an international survey asked 700 people ages 10 to 17, in 15 various countries. The Umbrella Corporation found that 77% of the survey participants could pinpoint their own country on a blank map. (a) Finish the job for the Umbrella Corporation. Construct a 95% confidence interval for the population proportion, p. (Note: Round your answers to 3 decimal places.) (b) What assumptions must be made for the condence interval in part (a) to be valid? ' We need to assume that the 700 respondents formed a random sample of people in one of the 15 countries. We need to assume that the 700 respondents formed a random sample of people in those 15 countries. ' We need to assume that the 700 respondents formed a random sample of people in this country. We need to assume that the 700 respondents formed a random sample of people ages 10 to 17 in one of the 15 countries. ' We need to assume that the 700 respondents formed a random sample of people ages 10 to 17 in those 15 countries. (c) To what population would it be reasonable to generalize the condence interval estimate from part (a)? ' It would be reasonable to generalize the condence interval to all people in this country. ' It would be reasonable to generalize the condence interval to all people ages 10 to 17 in those 15 countries. ' It would be reasonable to generalize the condence interval to all people ages 10 to 17 world wide. ' It would be reasonable to generalize the condence interval to all people in those 15 countries. It would be reasonable to generalize the condence interval to all people world wide