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In probability theory and statistics, variance is the expected value of the squared deviation from the mean of a random variable. The standard deviation (SD) is obtained as the square root of the variance. Variance is a measure of dispersion, meaning it is a measure
La varianza también es equivalente al segundo cumulante de una distribución de probabilidad que genera . La varianza se designa típicamente como , o a veces como o , o simbólicamente como o simplemente (pronunciado " sigma al cuadrado"). La expresión para la varianza puede expandirse como sigue:
18 de ene. de 2023 · Learn what variance is, how to calculate it by hand or with a calculator, and why it matters for statistical tests. See formulas, examples, and tips for population and sample variance.
19 de dic. de 2023 · Variance is a statistical measure of how far each number in a data set is from the mean. It is used to assess volatility, risk, and performance of investments and other data. Learn how to calculate variance and its square root, standard deviation.
Learn how to calculate and interpret the standard deviation and variance of a set of data. The standard deviation measures how spread out the data is from the mean, while the variance is the average of the squared differences from the mean.
Learn how to calculate and interpret variance, a measure of variability that assesses the average squared difference between data values and the mean. Compare the population and sample variance formulas and see examples of variance calculations.
Aprende qué es la varianza, cómo se calcula y cómo se relaciona con la edad promedio de una muestra. Ejercita con un ejemplo de cebras y usa la calculadora interactiva.
