An Independent Variable Should Be Removed to Improve the Regression

question 18

Multiple Choice

An independent variable should be removed to improve the regression model if ________.

• A)the correlation coefficient is -1
• B)the R² value is 1
• C)the t-statistic is lesser than 1
• D)the p-value is greater than 0.05

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Definitions:

Treatment Effectiveness

The degree to which a treatment achieves its intended outcome(s) in a real-world (clinical or practical) setting.

Between-Groups Designs

Experimental designs where different groups of participants are exposed to various conditions or treatments, allowing for comparisons between group outcomes.

Posttest-Only Control

A research design where subjects are assigned to experimental or control groups and are tested on the dependent variable only after the treatment.

Confidentiality

The ethical and often legal obligation to keep someone's personal information private, especially within a professional or research context.