What Was Hubble's Major Contribution to Cosmology

question 1

Multiple Choice

What was Hubble's major contribution to Cosmology?

• A) He identified Cepheid Variable stars.
• B) He proved the Big Bang Theory.
• C) He developed a new method for measuring the absolute magnitude of stars.
• D) He identified numerous new galaxies outside the Milky Way.
• E) He measured the size of the universe.

---

Definitions:

Normal Distribution

A bell-shaped frequency distribution curve that is symmetric about the mean, showing that data near the mean are more frequent in occurrence.

Goodness-of-fit Test

A statistical test used to determine if a set of observed frequencies differs significantly from the expected frequencies.

Test Statistic

A value calculated from sample data during a hypothesis test, used to make a decision about the null hypothesis.

Z

In statistics, 'Z' often refers to a Z-score, which measures the number of standard deviations a data point is from the mean.