rey of 3189 adults, 1400 say they have started paying bills online in the last year. ct a 99% confidence interval for the population proportion. Interpret the results. onfidence interval for the population proportion is (]. D. o three decimal places as needed.) your results. Choose the correct answer below. he endpoints of the given confidence interval show that adults pay bills online 99% of the time. With 99% confidence, it can be said that the population proportion of adults who say they have started paying bills online in the last year is between the endpoints of the given confidence int With 99% confidence, it can be said that the sample proportion of adults who say they have started paying bills online in the last year is between the endpoints of the given confidence interv