Examlex
With relational database systems, during database design the systems analyst defines the structure of each table in the system, as well as relationships among the tables.
E(X + Y)
The expected value of the sum of two random variables, equal to the sum of their individual expected values.
Covariance
A measure that indicates the extent to which two variables change together, but does not indicate the strength of their relationship.
Independent
Not influenced by or dependent on another variable; in statistics, it often means that the occurrence of one event does not affect the probability of another event.
COV(X,Y)
Covariance between two variables X and Y, measuring the extent to which the variables change together and indicating the direction of their linear relationship.
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