Answer:
Standard error of the mean
Explanation:
the standard error of the mean is when there is a deviation of the sample mean from what is the actual mean of a population. When the standard error is smaller, the more possible it will be for the sample to be a representative the overall population.
SE = sigma ÷ √n
Where
SE = Standard Error of the sample
Sigma = standard deviation of the sample
n = number of samples.