If a Qualitative Variable Has M Categories, You Should Use

question 89

True/False

If a qualitative variable has m categories, you should use m - 1 dummy variables to incorporate the qualitative variable into a regression model.

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Definitions:

Absolute Threshold

The minimum intensity of a stimulus that can be detected by a person's senses at least 50% of the time.

Difference Threshold

The smallest amount by which a stimulus can be changed and the difference be detected half the time, also known as the just noticeable difference.

Weber's Law

A principle stating that the smallest noticeable difference in stimulus intensity is proportional to the intensity of the initial stimulus.

Chronic Obstructive Pulmonary Disease (COPD)

A group of lung diseases characterized by increasing breathlessness, frequent coughing, and sputum production.