Assignment:
The chairman of the board wants to poll the stockholders to see what percentage are in favor of the policies of the current corporate president. How many shareholders must he survey if 20 percent are expected to return their questionaires and he wants to be within 2 percentage points of the percentage he would get if he were to survey the entire body of shareholders? Let the level of confidence be 95%.
Provide complete and step by step solution for the question and show calculations and use formulas.