In statistical theory, covariance is a measure of how much two random variables change together. In other words, covariance is a measure of the strength of the correlation between two random variables. Also, it can be considered as a generalization of the concept of variance of two random variables.
Facts & Figures. Lake Baikal is the largest freshwater lake by volume (23,600km3), containing 20% of the world's fresh water. At 1,637m, it is the deepest freshwater lake in the world; the average depth is 758m. It is 636km long and 81km wide; the surface area is 31,494km2. The lake is estimated to be 25 million years old, making it one of the most ancient lakes in geological history.
Lake Baikal is the oldest and deepest lake on Earth. It is located in southern Siberia, in Russia. The deepest and oldest freshwater lake in the world, Lake Baikal is located in southern Siberia. The lake contains about one fifth of the worldâs supply of fresh water and is also the ninth largest in surface area.