In probability theory and statistics, variance is the expectation of the squared deviation of a random variable from its mean, and it informally measures how far a ...
The spread between numbers in a data set, measuring Variance is calculated by taking the differences between each number and the mean, squaring the ...
Sep 25, 2013 ... Variance measures how far a data set is spread out. Definition, examples of variance. Step by step examples and videos; statistics made ...
The variance is therefore equal to the second central moment mu_2 . Note that some care is needed in interpreting sigma^2 as a variance, since the symbol ...
Standard Deviation and Variance. Deviation just means how far from the normal. Standard Deviation. The Standard Deviation is a measure of how spread out ...
Thinking about how we can estimate the variance of a population by looking at the data in a sample.
Define variance: an amount of difference or change — variance in a sentence.
An R tutorial on computing the variance of an observation variable in statistics.