Table 8 Friedman mean rank test results.

From: Hippopotamus optimization algorithm: a novel nature-inspired optimization algorithm

Algorithms

Functions

F1-F23

ZP

CEC 2019

CEC 2014 (10)

CEC 2014 (30)

CEC 2014 (50)

CEC 2014 (100)

HO

2.2468

2.0335

2.1434

2.0226

2.0284

2.0217

2.0256

WOA

4.693

4.966

8.5141

8.8319

7.1239

8.434

6.8774

GWO

4.53

7.1087

7.1867

6.9419

6.5996

7.3247

6.0552

SSA

4.8758

9.5542

6.2015

6.424

5.646

5.9983

6.0104

PSO

6.3291

7.3217

4.6159

5.8865

3.9804

3.7454

3.9899

SCA

9.4641

8.2399

9.4312

8.9309

9.298

9.517

9.2506

FA

10.005

9.824

7.3172

7.3571

7.1632

8.7833

8.1341

GOA

8.9501

8.3386

6.9473

6.7838

5.6549

6.3476

6.0404

TLBO

3.8652

7.3906

6.2127

4.2202

5.5663

5.696

6.0148

CMA-ES

4.4836

10.278

7.3832

6.1895

5.7586

7.7156

7.4959

MFO

6.9976

8.0348

7.055

7.1332

7.0379

7.6824

7.3757

AOA

6.3965

6.5091

8.3732

9.1576

7.9849

9.2846

8.2072

IWO

7.7272

9.9419

8.303

7.7436

6.9385

7.6078

6.2446