Standard Error
Measure the inaccuracy of your sample mean against the real world.
Standard Error of the Mean (SE)1.8257
Base Formula
SE = σ / √n
Resolution
Desvio Padrão (σ) = 10
Tamanho da Amostra (n) = 30
SE = 10 / √30 = 1.8257
Evaluating the Quality of the Study
You tested a medicine on only 30 people? The Standard Error uses the Standard Deviation by dividing it by the square root of this small quantity. The result will be a high number that proves the instability of your sample mean! The larger the sample (n), the smaller your Standard Error will be.