The Mass of a Galaxy's Central Black Hole Is Related

question 73

Multiple Choice

The mass of a galaxy's central black hole is related to the mass of the galactic bulge. This implies that ____.

• A) central black holes formed when the galaxy bulges formed
• B) central black holes have grown during the galaxy's lifetime as the galactic bulge has grown
• C) galactic bulges shrink over time as mass is consumed by the central black hole
• D) central black holes cause the formation of galactic bulges
• E) black holes are only present in spiral galaxies

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Definitions:

Confidence Interval

Values derived from sample analyses, that fall within a range likely to encompass the parameter of an unseen population.

Sample

A subset of a population selected for measurement, observation, or questioning to provide statistical information about the population.

Standard Error

The standard deviation of the sampling distribution of a statistic, typically the mean, indicating the accuracy of a sample mean estimate relative to the population mean.

Confidence Interval

A range of values derived from sample data that is likely to cover the true population parameter with a specified level of confidence.