what is a realistic margin of error
The margin of error for a particular statistic of interest is usually defined as the radius (or half the width) of the confidence interval for that statistic. The term can also be used to mean sampling error in general.he margin of error is a statistic expressing the amount of random sampling error in a survey 's results. It asserts a likelihood (not a certainty) that the result from a sample is close to the number one would get if the whole population had been queried.