When Predicting Y , Adding a Second Predictor Variable to the First

question 55

Multiple Choice

When predicting Y , adding a second predictor variable to the first predictor variable X , will _______.

• A) always increase prediction accuracy
• B) increase prediction accuracy depending on the relationship between the second predictor variable and X
• C) Increase prediction accuracy depending on the relationship between the second predictor variable and Y
• D) b and c

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Definitions:

Observational

Pertaining to data or a study method where the researcher observes subjects without manipulating any variables.

Nominal Scale

Refers to a classification system in statistics where data can be divided into non-numeric categories that are labeled or named; there is no intrinsic ordering to the categories.

Mikhail Gorbachev

The last leader of the Soviet Union, known for implementing reforms that contributed to the end of the Cold War.

Power Removal

The act or process of taking away authority and control, typically from someone in a position of power.