Proper Motion Is the Motion

question 205

Multiple Choice

Proper motion is the motion

• A) of a star or other object across (at right angles to) the line of sight.
• B) of a star or other object along the line of sight, toward or away from us.
• C) allowed by the laws of physics.
• D) of a star or other object in any direction through space.

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Definitions:

Margin of Error

Indicates the confidence in the precision of a survey or poll result, quantifying potential deviation from the true population value.

Standard Deviation

An indicator of the range or distribution of a data set, showing the degree to which the values diverge from the average.

ACT Test Takers

Individuals who participate in taking the ACT, a standardized test used for college admissions in the United States.

Confidence Interval

A statistical term for the range within which we expect, with a certain level of confidence, that a population parameter lies based on a sample statistic.