When Variables a and B Are Independent, the Variance of a -

question 42

Multiple Choice

When variables A and B are independent, the variance of A - B is equal to

• A) the variance of A plus the variance of B.
• B) the variance of A.
• C) variance of A minus the variance of B.
• D) it cannot be determined from the information given here.

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Definitions:

Scientific Investigation

A systematic process for acquiring new knowledge about the natural world based on observable, empirical evidence.

Analyse

To examine something in detail in order to understand it better or discover more about it.

Report Findings

The process of formally presenting results or discoveries from research, investigations, or assessments to a relevant audience.

Standardised Psychological Test

An assessment tool that is administered and scored in a consistent, or "standard", manner to measure psychological constructs.