Sand Is Composed Mostly of ____ and Is Used to Make

question 92

Multiple Choice

Sand is composed mostly of ____ and is used to make glass, bricks, and concrete for the construction of roads and buildings.

• A) shells, skeletons, and other remains of dead aquatic organisms
• B) aluminum
• C) phosphate salts
• D) silicon dioxide (SiO₂)
• E) calcium carbonate, or CaCO₃

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Definitions:

Population Mean

The average of all the values in a population, calculated as the sum of all values divided by the number of values.

Sample Mean

The arithmetic average of a set of numerical values, calculated by adding them together and dividing by the number of observations.

Sample

A subset of individuals or observations selected from a larger population for the purpose of statistical analysis.

Descriptive Measure

A descriptive measure provides a summary or analysis that captures the characteristics or features of a dataset, often in terms of central tendency or variability.