What Are the Two Key Observational Facts That Led to Widespread

question 15

Multiple Choice

What are the two key observational facts that led to widespread acceptance of the Big Bang model?

• A)the predominance of matter over antimatter and the near- critical density of the universe
• B)the cosmic background radiation and the near- critical density of the universe
• C)the cosmic background radiation and the expansion of the universe
• D)the cosmic background radiation and the helium content of the universe
• E)the predominance of matter over antimatter and the large scale structure of the universe

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Definitions:

IQR

IQR, or Interquartile Range, measures the middle 50% spread of a dataset by calculating the difference between the first (25th percentile) and third (75th percentile) quartiles.

Range

The difference between the highest and lowest values in a dataset.

Median

The middle value in a data set when it is organized in ascending or descending order, or the average of the two middle values if the set has an even number of observations.

IQR

IQR, or Interquartile Range, is a measure of statistical variability, which is calculated as the difference between the 25th (first quartile) and the 75th percentile (third quartile) values in a data set, showing the spread of the middle 50% of the data.