By Which Distribution System Is More Than 90 Percent of U.S.coal

question 98

Multiple Choice

By which distribution system is more than 90 percent of U.S.coal shipped?

• A)railroads
• B)trucks
• C)waterways
• D)pipelines
• E)none of the above

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Definitions:

Statistical Precision

How similar the results are when measurements are taken repeatedly in unaltered circumstances.

T-statistic

A value derived from a T-test that measures the size of the difference relative to the variation in the sample data.

Statistical Probability

A measure of how likely an event is to occur based on available data or statistical analysis.

Critical Value

A point on the scale of the test statistic beyond which we reject the null hypothesis; it is dependent on the chosen significance level.