If the Fitted Regression Is Y = 3

question 130

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 .50.

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Definitions:

Non-Rapid Eye Movement

A phase of sleep characterized by slower brain waves, reduced eye movement, and decreased body movement, which includes stages 1 through 3 of the sleep cycle.

Disorder Of Arousal

A type of sleep disorder involving partial arousals from deep sleep, leading to behaviors like sleepwalking, night terrors, or confusional arousals.

Confusional Arousal

A sleep disorder characterized by a state of confusion and disorientation upon waking, often with incomplete awakening.