An Astronomer Studying a Distant Galaxy Finds That Its Recessional

question 135

Multiple Choice

An astronomer studying a distant galaxy finds that its recessional velocity is 14,000 km/s. What is the distance to the galaxy? Assume Hubble's constant to be 73.5 km/s per Mpc.

• A) 1,030,000 Mpc
• B) 103 Mpc
• C) 190 Mpc
• D) 1900 Mpc

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Definitions:

R-Square Value

A statistical measure of how close the data is to the fitted regression line, also known as the coefficient of determination.

Total Variation

The overall measure of variability or spread in a dataset or the sum of explained and unexplained variation in a model.

Independent Variable

A variable in research or experiments that is manipulated or controlled by the researcher to observe its effect on the dependent variable.

Significance Level

The threshold below which a p-value is considered statistically significant, commonly set at 0.05.