The standard error of a sample proportion can be calculated as:

Standard error = √p(1-p) / n

where:

To find the standard error of a sample proportion, simply enter the necessary values below and then click the “Calculate” button.

p (proportion of successes)

n (sample size)

Standard error = √p(1-p) / n

Standard error = √0.2(1-0.2) / 23 = 0.083406