For the poll described in Exercise 1, what values do p̂, q̂, n, E, and p represent? If the confidence level is 95%, what is the value of a?

Data From 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?