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Table 7 Parameter estimates for Wheaton river data (standard errors in parentheses)

From: Families of distributions arising from the quantile of generalized lambda distribution

Distribution

aBP

aBC

aGW

U-E{GL}

Parameter estimates

\( \widehat{a}=7.6954 \)

\( \widehat{b}=85.75 \)

\( \widehat{\theta}=0.1 \)

\( \widehat{k}=0.0208 \)

\( \widehat{a}=317.0256 \)

(312.5864)

\( \widehat{b}=1.4584 \)

(0.4899)

\( \widehat{\theta}=-0.0482 \)

(1.2301)

\( \widehat{\lambda}=0.09617 \)

(0.0688)

\( \widehat{\mu}=-0.6548 \)

(1.1214)

\( \widehat{\sigma}=3.3672 \)

(0.7295)

\( \widehat{a}=1.4848 \)

(0.3665)

\( \widehat{\lambda}=8.0323 \)

(2.8206)

\( \widehat{\theta}=0.1134 \)

(0.0201)

\( {\widehat{\lambda}}_3=5.3192 \)

(2.2026)

\( {\widehat{\lambda}}_4=3.0133 \)

(1.0588)

Log-likelihood

– 272.1280

– 260.4813

– 247.8373

– 247.7

AIC

552.256

528.952

503.7

501.4

K-S statistic

(p-value)

0.1625

(0.0446)

0.1219

(0.2350)

0.0662

(0.9101)

0.0531

(0.9873)

  1. a MLEs, K-S statistic (p-value) are from Al-Aqtash et al. (2015).