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, at the start of the Angara River, Irkutsk, Siberia, Russia, 1980s. Baikal is the largest freshwater lake in Asia and the deepest lake in the world.Getty Images. This page includes three lists of the world's largest lakes. They are ranked by surface area, volume, and depth.eepest Lakes in the World. Source: Wikipedia. * Some consider the Caspian Sea not to be a lake but it is surrounded by land and thus meets the generally accepted definition of a lake. ** Lake Baikal holds one-fifth of the world's freshwater.