If the Redshifts of Quasars Arise from the Expansion of the Universe,yet

question 31

Multiple Choice

If the redshifts of quasars arise from the expansion of the universe,yet they have brighter magnitudes than galaxies with the same redshifts,what must be generally true of quasars?

• A)They are very small.
• B)They are within the Local Group.
• C)They are moving toward Earth with a large radial velocity.
• D)They emit a very large amount of energy per second.

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Definitions:

Type II Error

The error that occurs when a statistical test fails to reject a false null hypothesis—essentially, a false negative.

Null Hypothesis

A hypothesis that suggests there is no significant difference or relationship between specified groups or variables, serving as a default position until evidence suggests otherwise.

Sampling Error

The error that occurs due to selecting a sample instead of conducting a census of the entire population, leading to discrepancies between the sample and population parameters.

Statistical Power

The probability that a statistical test will correctly reject a false null hypothesis, related to the study's sample size and effect size.