Based on stratified samples of river heights, oceanographers estimate that 4,800 cubic kilometers (km) of freshwater is discharged into the Arctic Ocean annually. Their study has a
margin of error of 240 km at the 90% confidence level. Which of the following is the most
reasonable claim about the freshwater discharged annually into the Arctic Ocean?
It is likely to be between 4.800 and 5.040 km
It is likely to be between 4.560 and 5.040 km
It is likely to be between 240 and 4.800 km
It is likely to be between 240 and 4.320 km