The Possibility of Extraterrestrial Life Was First Considered

question 55

Multiple Choice

The possibility of extraterrestrial life was first considered

• A) after the invention of the telescope
• B) only during the past few decades
• C) many thousands of years ago during ancient times
• D) at the turn of the 20th century

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Definitions:

Blocked Experiment

An experimental design in which units are grouped (blocked) based on similar characteristics before being randomly assigned to treatments, to reduce variation.

Fixed-Effects ANOVA

A variation of ANOVA where only factors that are fixed (non-random) are considered in the analysis.

SSE

Sum of Squared Errors; a measure used in statistics to quantify the difference between the observed and predicted values by a model.

SSB

In statistics, SSB stands for the Sum of Squares Between groups, which is used in variance analysis to determine the variance among different groups.