If the Fitted Regression Is Y = 3

question 46

Multiple Choice

If the fitted regression is Y = 3.5 + 2.1X (R² = .25, n = 25) , it is incorrect to conclude that:

• A)Y increases 2.1 percent for a 1 percent increase in X.
• B)the estimated regression line crosses the Y axis at 3.5.
• C)the sample correlation coefficient must be positive.
• D)the value of the sample correlation coefficient is 0.50.

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Definitions:

Regulates Thirst

The physiological process that maintains hydration in the body by triggering the sensation of thirst.

Limbic System

A complex system of nerves and networks in the brain, involved in basic emotions (such as fear and pleasure) and drives (such as those for food and sex).

Medulla

The base of the brainstem, controlling vital life-sustaining functions such as heartbeat, breathing, blood pressure, and digestion.

Hypothalamus

Situated under the thalamus, this brain region is crucial for orchestrating the activities of the autonomic nervous system and pituitary secretion, thereby regulating core bodily functions such as temperature control, thirst, and hunger to maintain internal balance.