By Studying Distant Galaxies in the 1920s, Hubble Made the Following

question 74

Multiple Choice

By studying distant galaxies in the 1920s, Hubble made the following important discovery that led us to conclude that the universe is expanding.

• A)All galaxies were born at the same time, and all will die at the same time.
• B)All galaxies outside the Local Group are moving away from us, and the farther away they are, the faster they're going.
• C)All galaxies outside the Local Group are moving away from us, and all are moving away at nearly the same speed.
• D)All galaxies outside the Local Group are orbiting the Local Group.
• E)All galaxies contain billions of stars, and all galaxies have spiral shapes.

Design experiments and observational studies to compare two groups using paired and independent samples.

Evaluate the assumptions of statistical tests and the appropriateness of test selection based on the data structure.

Understand the concept of significance levels and p-values in the context of hypothesis testing.

Learn to construct and interpret confidence intervals for the mean difference in independent samples.

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Definitions:

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