Siteadmin, Bureaucrats, Check users, nsAm_Govt_101RO, nsAm_Govt_101RW, nsAm_Govt_101_ta, nsJudgesRO, nsJudgesRW, nsJudges_talkRO, nsJudges_talkRW, nsTeam2RO, nsTeam2RW, nsTeam2_talkRO, nsTeam2_talkRW, oversight, Administrators
125,790
edits
Changes
Jump to navigation
Jump to search
Line 1:
Line 1: + +
informal introduction to concept
'''Correlation''' refers to how a characteristic is common to a group, as in the '''correlation''' between hard work and success. The correlation is usually not 100%, as a few people may succeed without hard work, and a few people may fail with hard work. But there is a correlation if typically hard work does result in success.
The '''correlation coefficient''', also known as '''Pearson's r''', is a statistical measure of association between two ratio variables. It is defined as:
The '''correlation coefficient''', also known as '''Pearson's r''', is a statistical measure of association between two ratio variables. It is defined as: