A value close to -1 indicates a negative linear correlation; that is, when one variable increases the other decreases. A value close to 0 indicates a non-linear, or random, correlation. The equation for calculating the correlation coefficient is where Xi and Yi are the set of variables, and the sample means.
A demographic is a subset of a population that shares a common factor such as age, income or education level. The Millennial generation, for example, is the demographic cohort that immediately follows Generation X. Although there is a great deal of variation from one individual to another within any generational cohort, the particular environment for any generation affects those individuals in ways that are observable as broad tendencies.
Lesson Summary. Now, let's review demography, which is the study of the size, density, and distribution of the human population and the concept of demographic transition. Demographic transition is a series of stages that a country goes through when transitioning from non-industrial to industrial.his discovery resulted in the creation of the concept of demographic transition, which is a series of stages that a country goes through when transitioning from non-industrial to industrial. The demographic transition concept involves four stages that are based on changes to population size and social behaviors.