For the poll described in Exercise 1, describe what is meant by the statement that the margin

Question:

For the poll described in Exercise 1, describe what is meant by the statement that "the margin of error was given as {4 percentage points."
Exercise 1
USA Today provided results from a poll of 1000 adults who were asked to identify their favorite pie. Among the 1000 respondents, 14% chose chocolate pie, and the margin of error was given as ±4 percentage points. What important feature of the poll was omitted?