What Produces the 21- Cm Radio Line That We Can

question 72

Multiple Choice

What produces the 21- cm radio line that we can be used to map the Milky Way Galaxy?

• A)molecular hydrogen
• B)ionized hydrogen
• C)carbon monoxide
• D)atomic hydrogen
• E)helium

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Definitions:

68-95-99.7 Rule

A statistical rule stating that for a normal distribution, approximately 68% of the data falls within one standard deviation of the mean, 95% within two standard deviations, and 99.7% within three standard deviations.

Observed Responses

Observed responses refer to the actual outcomes or reactions recorded in an experiment or survey, following exposure to certain conditions or stimuli.

Linear Regression

A statistical method for modeling the relationship between a dependent variable and one or more independent variables by fitting a linear equation.

Standard Deviation

A measure of the dispersion or spread of a set of data points relative to their mean, showing how much variation exists.