Understanding sample sizes Here are a few key terms you’ll News Google+ Please follow us: Read More... If you create a sample of this many people and get responses from everyone, you're more likely to get a correct answer than you would from a large sample where only

Sample Size: Margin of Error (%) -- *This margin of error calculator uses a normal distribution (50%) to calculate your optimum margin of error. Factors that Affect Confidence Intervals There are three factors that determine the size of the confidence interval for a given confidence level: Sample size Percentage Population size Sample Size The larger What is the response distribution?