Dark Matter Is Suspected to Exist in the Universe Because

question 58

Multiple Choice

Dark matter is suspected to exist in the universe because:

• A)the night sky is dark between stars
• B)the orbital period of stars in the outer parts of a galaxy is greater than the orbital period of stars near the galactic center
• C)the orbital period of stars in the outer parts of a galaxy is less than the orbital period of stars near the galactic center
• D)the orbital period of stars in the outer parts of a galaxy is about the same as the orbital period of stars near the galactic center
• E)all galaxies have about the same mass

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Definitions:

Validity Generalization

A statistical approach asserting that test validity can be generalized across various contexts, especially used in psychometrics for employment testing.

Criterion-related Validity

A measure of the effectiveness of a test or assessment in predicting an individual's performance on related tasks or outcomes.

Content Validation

The process of evaluating whether a test or measure accurately covers the content or competencies it is supposed to assess.

Content Validation

The process of ensuring that a test or assessment measures what it is intended to measure, by having its content closely aligned with the constructs it's supposed to test.