The direction of a correlation is either positive or negative. In a negative correlation, the variables move in inverse, or opposite, directions. In other words, as one variable increases, the other variable decreases. For example, there is a negative correlation between self-esteem and depression. In other words, the higher your self-esteem, the lower your feelings of depression.
Excel Communications was founded in 1988 by Dallas entrepreneur Kenny Troutt as a long distance reseller in the US telecom sector at the birth of telecom deregulation.
The Dewey Decimal System was created by 21-year-old Melvil Dewey and copyrighted in 1876. Born December 10th, 1851 in Adams Center, New York; his Dewey Decimal system revolutionized the libraries across the world. Melvil is considered the âFather of Modern Librarianshipâ and, more than any other individual, the founder of the library science.