Determine how many people you need to survey in order to get results that reflect the target audience.
  Choose the Confidence Level you want (90%, 95%, 99%).
  Z (confidence level)  
  Enter the Percentage of Population
(set to default value of 50%) *
  Select the Confidence Interval (Margin of Error) %
(+ or -) for this program.
  Sample Size  
  * Enter percentages as a number, e.g., 45 for 45%, 2 for 2%, etc.