Calculate the accuracy of a sample
When the survey is disseminated to a sample, it is possible to estimate the rate of accuracy, which corresponds to the interval of confidence given to the results obtained from the sample, in relation to the results that would have been obtained on the whole parent population.
For this, the following link allows you to calculate the accuracy of the sample and the interval of confidence of your results :
http://www.sphinxonline.net/sphinx/aide/precisionechantillon.htm