A survey was conducted to estimate the proportion of students at a large university who work part-time. Based on a random sample of students, the estimated proportion is , with a margin of error of . Based on this estimate and margin of error, which of the following is the most appropriate conclusion about the proportion of all students at the university who work part-time?
The proportion is exactly .
It is plausible that the proportion is less than .
It is plausible that the proportion is between and .
It is plausible that the proportion is greater than .
