Table 8 The ML Estimates (standard error in parenthesis) for data set I.

From: Introducing novel arc cosine-\(\Psi\) class of distribution with theory and data evaluation related to coronavirus

Model

\(\hat{\gamma _{1}}\)

\(\hat{\gamma _{2}}\)

\(\hat{\gamma _{3}}\)

\(\hat{\gamma _{4}}\)

NACWD

32.2668

1.3959

–

–

(5.3311)

(0.0880)

–

–

NATFD

0.0911

0.8304

–

–

(0.0149)

(0.0429)

–

–

NCWD

8.9853

1.0149

–

–

(1.2071)

(0.0604)

–

–

WD

16.4160

1.4357

–

–

(2.7706)

(0.0894)

–

–

AWD

43.1965

4.1252

2.5538

0.9911

(19.1386)

(2.2819)

(0.4075)

(0.1660)

KPFD

3.6798

0.0174

17.8945

10.4266

(1.8535)

(0.0053)

(10.0180)

(2.2230)

FD

0.8566

0.0539

–

–

(0.0445)

(0.0051)

–

–

IBD

0.0494

8.4924

–

–

(0.0960)

(16.4865)

 

–

LXD

0.0221

346.69

–

–

(0.0172)

(270.27)

 

–

EED

10.1461

1.6021

–

–

(0.8736)

(0.1692)

 

–