On the Mathematical Expectation of the Sample Variance in Simple Sampling Technique. SCOPUA Journal of Applied Statistical Research, [S. l.], v. 1, n. 2, 2025. DOI: 10.64060/JASR.v1.i2.3. Disponível em: https://journals.scopua.com/index.php/JASR/article/view/53. Acesso em: 28 feb. 2026.