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All else held constant, the width of a confidence interval is most likely to be smaller if the sample size is:

A. Larger and the degree of confidence is lower.
B. Larger and the degree of confidence is higher.
C. Smaller and the degree of confidence is lower.

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When calculated for the same data and provided there is variability in the observations, the geometric mean will most likely be:

A. Equal to the arithmetic mean.
B. Less than the arithmetic mean.
C. Greater than the arithmetic mean.

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Which of the following is least likely one of main purposes of derivative markets？

A. Reveal prices and volatility of the underlying assets
B. Improve market efficiency by lowering transaction costs
C. Enable companies to more easily practice risk management

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When market participants expect the spot price of a commodity to be higher in the future, the commodity market is most likely said to be in:

A. contango.
B. Full carry
C. backwardation

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Which of the following statements concerning market structure and HerfindahI-Hirschman Index （HHI） is most accurate？

A. HHI is a useful measure of potential barriers to entry.
B. Low control over prices is characteristic of oligopolies.
C. An HHI value of 60 indicates that a market is highly competitive.

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All else held constant, the width of a confidence interval is most likely to be smaller if the sample size is:

A. Larger and the degree of confidence is lower. B. Larger and the degree of confidence is higher. C. Smaller and the degree of confidence is lower.

When calculated for the same data and provided there is variability in the observations, the geometric mean will most likely be:

Which of the following is least likely one of main purposes of derivative markets？

When market participants expect the spot price of a commodity to be higher in the future, the commodity market is most likely said to be in:

Which of the following statements concerning market structure and HerfindahI-Hirschman Index （HHI） is most accurate？

A. Larger and the degree of confidence is lower.
B. Larger and the degree of confidence is higher.
C. Smaller and the degree of confidence is lower.