In a random sample of 1500 U.S. adults, 780 of them are "thriving", which is defined as rating their current life as 7 or higher on a 10 point scale and rating their future life as 8 or higher on a 10 point scale.
Find and interpret a 99% confidence interval for the proportion of all U.S. adults who are thriving (based on this definition).Is it reasonable to conclude that the majority of all U.S. adults are thriving? Why or why not?