If an Independent Variable Is Added to a Multiple Regression

question 85

Multiple Choice

If an independent variable is added to a multiple regression model, the R² value​

• A) ​becomes larger or smaller depending on the statistical significance of the variable.
• B) ​becomes larger even if the variable added is not statistically significant.
• C) ​might or might not become larger even if the variable added is statistically significant.
• D) is not affected by the variable added even if it is statistically significant.

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Definitions:

Endorphins

Natural, pain-relieving chemicals produced by the body that promote a sense of well-being and can reduce pain.

Neurotransmitters

Chemical substances in the nervous system that transmit signals from one neuron to another across synapses.

Opioid Peptides

Natural chemicals in the brain that act like morphine, playing key roles in pain relief, reward, and addictive behaviors.

Oxytocin

A hormone and neurotransmitter involved in childbirth, lactation, and social bonding.