In Testing for the Differences Between the Means of Two

question 50

Multiple Choice

In testing for the differences between the means of two independent populations where the variances in each population are unknown but assumed equal,the degrees of freedom is:

• A) n₁ + n₂
• B) n₁ + n₂ - 2
• C) n₁ + n₂ - 1
• D) None of these choices

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Definitions:

Heraclitus

An ancient Greek philosopher known for his theory that change is the fundamental essence of the universe, encapsulated by the phrase "everything flows".

Pythagoras

An ancient Greek philosopher and mathematician known for formulating the Pythagorean theorem in geometry.

Spinoza

Baruch Spinoza, a philosopher of Portugese-Jewish origin, who proposed that God and Nature were two names for the same reality, leading to his excommunication from the Jewish community.

Substance

The essential reality of a thing or things that underlies the various properties and changes of properties. Its most common definitions: “that which is independent and can exist by itself”; “the essence of a thing which does not and cannot change.” In traditional metaphysics, substance is the same as “ultimate reality,” and the study of substance is that branch of metaphysics that studies reality—namely, ontology.