9.1

A national survey of 1000 adult citizens of a nation found that 21% dreaded Valentine's Day. The margin of error for the survey was 2.1 percentage points with 90% confidence. Explain what this means. Which statement below is the best explanation? Select all that apply. A. There is 90% confidence that the proportion of the adult citizens of the nation that did not dread Valentine's Day is between 0.769 and 0.811. B. There is 90% confidence that the proportion of the adult citizens of the nation that dreaded Valentine's Day is between 0. 189 and 0.231. C. There is 87.9% to 92.1% confidence that 21% of the adult citizens of the nation dreaded Valentine's Day. D. There is 90% confidence that 21% of the adult citizens of the nation dreaded Valentine's Day. E. There is a 90% probability that the proportion of the adult citizens of the nation that