A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie. Among the 500 respondents, 13% chose chocolate pie, and the margin of error was given as 3 percentage points. What values do p. q, n, E, and p represent? If the confidence level is 90%, what is the value of a? The value of p is The value of q is The value of n is The value of E is The value of p is If the confidence level is 90%, what is the value of a? a= (Type an integer or a decimal. Do not round.)