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.
âAll statistical analyses take into account dietary and demographic factors and tobacco and alcohol habits.â âA major demographic trend of the aging population is the increasing number of women.â âThe growth can be explained by demographic growth, he said, and not by efforts of the university.â âThe demographic trend throughout the western world is towards an aging population.â âThose social and demographic factors may be key contributors to potential crises in the future.â âComparisons are drawn between demographic patterns and career patterns of the two countries.â âThey point out that the demographic structure of Scotland is changing as we are becoming an aging society.â