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TABLE 8-11
A university wanted to find out the percentage of students who felt comfortable reporting cheating by their fellow students. A survey of 2,800 students was conducted and the students were asked if they felt comfortable reporting cheating by their fellow students. The results were 1,344 answered "Yes" and 1,456 answered "No."
-Referring to Table 8-11, a 90% confidence interval calculated from the same data would be narrower than a 99% confidence interval.
Room-And-Pillar
A method of mining that involves excavating rooms while leaving columns or pillars of material to support the mine roof.
Subsurface Mining
The extraction of minerals and ores from underground, involving tunnels or shafts to access geological resources deep below the earth's surface.
Surface Mining
A method of extracting mineral and energy resources near the surface of the Earth rather than through underground tunnels.
Bituminous Coal
A type of coal characterized by its high carbon content and heating value, commonly used for electricity generation.
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