Work out the Mean the simple average of the numbers Then for each number. The Variance is defined as. If the greater values of one variable mainly correspond with the greater values of the other variable and the same holds for the lesser values that is the variables tend to show similar behavior the covariance is positive.
The variance is a measure of variability.
The variance is a way of measuring the typical squared distance from the mean and isnt in the same units as the original data. We know that statistics is an essential branch of maths. In probability theory and statistics the variance formula measures how far a set of numbers are spread out. Variance is the average of squared differences of data from mean.