Power of Some Standard Goodness-of-Fit Tests of Normality Against Asymmetric Stable Alternatives
常用正态性拟合优度检验对非对称稳定分布备择的功效AI 解读 ↓
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In this article, we investigate the power of six standard goodness-of-fit tests of normality; several of these are sensitive to departures from normality in both skewness and kurtosis—the omnibus property. The power is estimated through simulation when the alternative is stable with α = 1.0(.3)1.9, β = .00(.25)1.00, and samples are of size n = 10, 20, 50, 100. The goodness-of-fit tests are based on the skewness statistic ✓b 1, the kurtosis statistic b 2, a joint test using ✓b 1 and b 2, the Shapiro-Wilk W, the Studentized range test u, and the D'Agostino D. Our results indicate that the test based on b 2 is generally preferred if n ≥ 50 and |β| ≤ .75. For the remaining configurations of n, α, and β, the test based on ✓b 1 is generally preferred.