In Testing for the Differences Between the Means of 2

question 126

Multiple Choice

In testing for the differences between the means of 2 independent populations where the variances in each population are unknown but assumed equal, the degrees of freedom are

• A) n - 1.
• B) n₁ + n₂ - 1.
• C) n₁ + n₂ - 2.
• D) n - 2.

---

Definitions:

Papillary Muscles

Muscles located in the ventricles of the heart that attach to the cusps of the atrioventricular valves via the chordae tendineae and help prevent valve inversion.

Apex

The top or highest part of something, often pointed; used in various anatomical contexts.

Auricles

The external part of the ear, also known as the pinna, which is visible on the sides of the head.

Chordae Tendineae

Tendinous cords that connect the papillary muscles to the atrioventricular valves in the heart to prevent inversion during contraction.