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Table 4 Simulation results (hypothesis tests) for the outcome scale {0, 1, 2}.

From: Parametric methods outperformed non-parametric methods in comparisons of discrete numerical variables

 

Mean deviation from 5%

Relative power (%)

Sample size

T

U

WMW

BM

T

U

WMW

BM

10, 10

0.19

0.30

0.60

0.75

90.2

88.4

86.7

100.0

25, 25

0.10

0.08

0.33

0.23

96.2

96.1

99.1

100.0

50, 50

0.04

0.05

0.23

0.11

97.5

97.4

100.0

99.7

100, 100

0.07

0.07

0.27

0.09

98.3

98.3

100.0

99.7

25, 10

1.27

0.29

1.24

0.42

97.9

94.1

96.7

100.0

50, 10

1.85

0.35

1.90

0.50

98.2

91.2

100.0

98.3

100, 50

0.87

0.06

0.89

0.08

98.0

97.4

100.0

99.2

100, 25

1.63

0.11

1.64

0.17

97.1

93.7

100.0

97.3

100, 10

2.25

0.36

2.27

0.51

97.1

86.9

100.0

94.3