σ-convergence and F-test.
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Note: F-test for CV, = CV19972/CVt2, where1997 is the base year, and t is the year under test. The null hypothesis is CV21997 ≤CV2t. The F-test for SD is by the same token. * significant at 10%, *** significant at 1%.
创建时间：
2013-08-19
