In a survey of 920 U.S. teenagers, 81% said that helping others who are in need will be very important to them as adults. Give an interval that is likely to contain the exact percentage of all U.S. teenagers who
think that helping others who are in need will be very important to them as adults.
O 77.7% -84.3%
78.2% 83.8%
O 79,6% -82.4%
O 75.3% -82.7%