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.
Caspian Sea and Lake Baikal. Lakes are defined as considerable inland bodies of freshwater. The Caspian Sea is considered by scholars to be the largest lake in the world. Ho â¦ wever, it has a salinity about one third of the oceans. The black sea is sometimes considered to be a lake but its salinity is about 60 percent of the oceans. Lake Baikal has more water volume than all of the great lakes combined.