Which of the Following Statements Describes the Variance of a Data

question 115

Multiple Choice

Which of the following statements describes the variance of a data set?

• A) The variance is a mean of absolute deviations.
• B) The variance is a mean of positive and negative deviations.
• C) The variance is a mean of squared deviations.
• D) The variance is a mean of only the positive deviations.

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Definitions:

Perched Water

Groundwater that sits above the main water table and generally is underlain by a layer or lens of impermeable rock that blocks the downward flow of groundwater.

Water Table

The level below which the ground is saturated with water, marking the boundary between the unsaturated zone above and the saturated zone below.

Groundwater

Water that occupies the pores and fractures in underground rock and soil, a critical source of freshwater for drinking, agriculture, and industry.

Spring

A place where groundwater flows out of the ground onto the surface.