Why Is It Important to Divide by Df to Compute

question 54

Multiple Choice

Why is it important to divide by df to compute sample variance?

• A)doing so makes the sample variance an unbiased estimator of the population variance
• B)doing so ensures that the value for sample variance varies between 0 and 1
• C)doing so minimizes the likelihood that the sample variance will be a negative value
• D)it is not important;dividing by df is optional

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Definitions:

Coronary Sulcus

A groove on the surface of the heart that marks the division between the atria and the ventricles.

Oxygen-poor Blood

Blood that has circulated through the body and has a lower oxygen content, returning to the heart for reoxygenation.

Pulmonary Trunk

The major blood vessel that carries blood from the heart to the lungs for oxygenation.

Aorta

The main and largest artery in the body, responsible for distributing oxygenated blood from the heart to all other arteries.