Find the Variance for the Given Data $$\begin{array} { l l l l l } 30.9 & 28.0 & 23.9 & 15.8 & 26.5 \\15.3 & 12.7 & 14.6 & 25.6 & 10.4\end{array}$$

question 8

Multiple Choice

Find the variance for the given data. Round your answer to one more decimal place than the original data.
-A class of sixth grade students kept accurate records on the amount of time they spent playing video games during a one-week period. The times (in hours) are listed below: $$\begin{array} { l l l l l } 30.9 & 28.0 & 23.9 & 15.8 & 26.5 \\15.3 & 12.7 & 14.6 & 25.6 & 10.4\end{array}$$

• A) \(215.45 \mathrm { hr } ^ { 2 }\)
• B) \(53.74 \mathrm { hr } ^ { 2 }\)
• C) \(53.84 \mathrm { hr } ^ { 2 }\)
• D) \(48.46 \mathrm { hr } ^ { 2 }\)

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Definitions:

Ore

A naturally occurring solid material from which a metal or valuable mineral can be extracted profitably.

Metamorphic Rock

Rock that was once one form of rock but has changed to another under the influence of heat, pressure, or some other agent without passing through a liquid phase.

Heat And Pressure

The combination of high temperature and force applied to a material, often leading to physical or chemical changes.

Igneous Rock

Rock formed through the cooling and solidification of magma or lava, foundational to the Earth's crust.