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A connection between two variables. Such a connection may not be evident until the data are displayed. An association between two variables is said to exist if the connection evident in a data display is so strong that it could not be explained as only due to chance.
In particular, two numerical variables are said to have positive association if the values of one variable tend to increase as the values of the other variable increase. Also two numerical variables are said to have negative association if the values of one variable tend to decrease as the values of the other variable increase.
See: relationship
Curriculum achievement objectives references
Statistical investigation: Levels 4, 5, 6, (7), (8)
