Which Idea Has Been Borne Out by Actual Astronomical Observations

question 46

Multiple Choice

Which idea has been borne out by actual astronomical observations over the past few centuries?

• A) The probability of life existing elsewhere in the universe, even elsewhere in our own solar system, is extremely great.
• B) Earth appears to occupy a unique position in the universe, unrepeated anywhere, since the Sun is unique in properties and position in a remarkable galaxy.
• C) All the observational evidence so far suggests that conditions for the evolution of life exist only on Earth in its position near the Sun.
• D) The Sun is an unremarkable star in a commonplace galaxy, and many similar stars exist in the universe around which life might evolve on planets.

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Definitions:

F-test

An F-test is a statistical test used to compare the variances of two populations and is based on the F-distribution.

Two Tail T-test

A statistical hypothesis test used to determine if there is a significant difference between the means of two groups, allowing for differences in both directions.

Population Means

The average value of a characteristic within a total population, providing a central tendency measure of the data set.

Populations

In statistics, a population refers to the complete set of items or individuals from which data can be collected.