交易风险是一种流量风险,是国际企业的一种最主要的外汇风险。( )
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以黄金作为国际储备有利无弊。( )
A. 对
B. 错
What does a convex, a concave, a convex-concave, or a concave-convex normal plot indicate? (30 points)
For distributions that are left-skewed, what kind of a Box-Cox transformation should be used? Explain the reason. (30 points)
For a right-skewed distribution, if after being transformed with a Box-Cox transformation, it becomes left-skewed, what does this mean? Explain the reason. (40 points)