A recent study asked U. S. adults to name 10 historic events that occurred during their lifetime that have had the greatest impact on the country. The most frequently chosen answer was the September 11, 2001, terrorist attacks, which was included by 77% of the 2,000 randomly selected U. S. adults. Construct and interpret a 99% confidence interval for the proportion of all U. S. adults who would include the 9/11 attacks on their list of 10 historic events. (Be sure to follow the 4-step process)
a. State (1) b. Plan (2) c. Do (2) d. Conclude (2)