Respuesta :
Variance is not expressed in the same units as the original data.
The variance of a random variable from its population mean or sample mean is expected in probability theory and statistics. The term "variance" refers to a measurement of how widely apart a group of numbers are from one another. In statistics, variance plays a key role. Descriptive statistics, statistical inference, hypothesis testing, goodness of fit, and Monte Carlo sampling are just a few notions that make use of variance. In the sciences, where data statistical analysis is frequently used, variance is a crucial instrument. The variance, which also refers to the second central moment of a distribution and the covariance between the random variable and itself, is defined as the square of the standard deviation.
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