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Table 2 The average lengths of the confidence interval and the corresponding coverage percentages (with brackets)

From: The estimation of the Burr-XII parameters with middle-censored data

n

(0.25,0.25)

(0.5,0.5)

(0.5,0.75)

(1,0.75)

(1.25,0.5)

a

b

a

b

a

B

a

b

a

b

10

1.376

1.353

1.503

1.368

1.538

1.346

1.351

1.412

1.404

1.289

(0.96)

(0.97)

(0.97)

(0.96)

(0.97)

(0.97)

(0.96)

(0.96)

(0.97)

(0.96)

30

0.703

0.737

0.748

0.796

0.767

0.725

0.730

0.796

0.777

0.784

(0.96)

(0.96)

(0.96)

(0.96)

(0.96)

(0.96)

(0.96)

(0.96)

(0.96)

(0.96)

50

0.583

0.515

0.567

0.533

0.539

0.582

0.582

0.510

0.538

0.495

(0.94)

(0.95)

(0.94)

(0.95)

(0.95)

(0.96)

(0.95)

(0.95)

(0.94)

(0.95)

70

0.416

0.441

0.479

0.470

0.468

0.452

0.448

0.442

0.463

0.476

(0.96)

(0.95)

(0.96)

(0.96)

(0.95)

(0.95)

(0.95)

(0.94)

(0.95)

(0.95)

100

0.356

0.349

0.368

0.371

0.358

0.345

0.375

0.317

0.328

0.368

(0.95)

(0.95)

(0.94)

(0.95)

(0.95)

(0.95)

(0.94)

(0.95)

(0.95)

(0.94)