Population variance is a type of the measure of spread that is often come into consideration in statistics whenever the population data is used. It is referred to the estimation how far the values of a population spread or disperse around the mean position.
Definition of scowl. intransitive verb. 1 : to contract the brow in an expression of displeasure. 2 : to exhibit a threatening aspect. transitive verb.
The definition of sleek is someone or something that is smooth, glossy, shiny, well-groomed or sophisticated. 1  Shiny and well-groomed hair is an example of hair that would be described as sleek. 2  A shiny new sports car with clean lines is an example of a car that would be described as sleek.