You Read About the Discovery of Quasars with Redshift Z

question 36

Multiple Choice

You read about the discovery of quasars with redshift z larger than 1.This means that

• A) their host galaxies are receding at speeds exceeding the speed of light.
• B) the measurements of redshift must be wrong; z cannot exceed 1.
• C) the relationship between z and receding speed must account for relativistic corrections.
• D) the speed of light can exceed c in the case of distant quasars.
• E) quasars must contain a lot of dark matter.

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Definitions:

Sampling Variability

The extent to which the statistic obtained from different samples for the same population varies.

Sample Mean

The average value of a set of observations sampled from a larger population.

Normally Distributed

A data distribution that is symmetrically shaped like a bell curve, with most data points clustering around a central mean value.

Sampling Distribution

The probability distribution of a statistic based on a large number of samples or simulations.