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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 · Variance is a measure of variability that shows how much each value differs from the mean. Learn how to calculate variance by hand or with a calculator, and why it matters for statistical tests and group comparisons. See formulas, examples and a table of contents for more details.
19 de dic. de 2023 · Variance is a statistical measurement of the spread between numbers in a data set. It measures how far each number is from the mean and how much risk an investment carries. Learn how to calculate variance, its advantages and disadvantages, and its relation to standard deviation.
Learn how to calculate the standard deviation and variance of a set of numbers, and how they measure how spread out or normal the data is. See formulas, examples, and a calculator for population and sample data.
Calcúlala como lo calcularías cualquier media: suma todos los puntos de datos, luego divídela por la cantidad de puntos de datos. Por ejemplo: primero suma todos los puntos de datos: 17 + 15 + 23 + 7 + 9 + 13 = 84. A continuación, divide la respuesta por la cantidad de puntos de datos, en este caso, seis: 84 ÷ 6 = 14.
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.
