# IGEM:MIT/2006/Notebook/2008-2-15

### From OpenWetWare

Source: Wikipedia:Margin_of_error

## Calculating the margin of error for a survey

The standard error of a reported proportion or percentage *p* measures its accuracy, and is the estimated standard deviation of that percentage. It can be estimated from just *p* and the sample size, *n*, if *n* is small relative to the population size, using the following formula:

Standard error =

95% confidence interval = 1.96*standard error