What is the difference between conceptual and logical database modeling?
What will be an ideal response?
Logical database modeling refers to the creation of the database model that is implementable by the DBMS software. Logical database model is also known as an implementational database model. A conceptual database model is simply a visualization of the requirements, independent of the logic on which a particular DBMS is based. The conceptual model serves as a blueprint for the actual (logical) database model.
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A) target B) capital C) tertiary D) demographic E) developing
The degrees of freedom for the t statistic to test the hypothesis about two independent samples is ________
A) n B) n - 1 C) n1 + n2 D) n1 +n2 - 2