Today, Nearly____ Percent of Earth's Surface Is Affected by Periglacial

question 89

Multiple Choice

Today, nearly____ percent of Earth's surface is affected by periglacial conditions.

• A) 1
• B) 20
• C) 60
• D) 80
• E) 100

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Definitions:

Interquartile Range

A measure of statistical variability, representing the difference between the 75th (upper quartile) and 25th (lower quartile) percentiles.

Variance

A gauge for the extent of dispersion in a collection of data, derived by the average of squared differences relative to the mean.

Sample Mean

The average of all the data points in a sample set from a population.

Squared Deviations

The squares of the differences between each value in a set and the mean of the set, used in various statistical computations including variance.