1. In a recent survey of 190 random American young people, 152 of them (80%) reported having successfully completed high school. Use technology to determine the margin of error for a 95% confidence interval for the corresponding population proportion. (Please round all proportions to three decimal places. Do not convert to a percentage.)



2. Suppose instead that 570 random American young people were surveyed and still 80% of them reported having successfully completed high school. Use technology to determine the margin of error for a 95% confidence interval for the corresponding population proportion in this circumstance. (Please round all proportions to three decimal places. Do not convert to a percentage.)



3. Which one of the following statements is true?