The Level Of Precision
The level of precision, sometimes called sampling error, is the range in which the true value of the population is estimated to be.
This range is often expressed in percentage points, (e.g., ±5 percent), in the same way that results for political campaign polls are reported by the media.
Thus, if a researcher finds that 60% of farmers in the sample have adopted a recommended practice with a precision rate of ±5%, then he or she can conclude that between 55% and 65% of farmers in the population have adopted the practice.