Table 6 Kruskal-Wallis and Mann-Whitney U test hypothesis tests for evaluator STL image quality scoring

Evaluation item

Hypothesis

DF

H statistic

P-value

Significance

CARP 1 score

H1

2

1.1809

0.55408

NS

CARP 2 score

H1

2

1.0042

0.60525

NS

CARP 3 score

H1

2

1.3301

0.51.425

NS

CARP 4 score

H1

2

2.9627

0.22733

NS

CARP 5 score

H1

2

0.7906

0.67349

NS

CARP 6 score

H1

2

0.8894

0.64102

NS

CARP 7 score

H1

2

2.3688

0.30592

NS

CARP 8 score

H1

2

0.1364

0.9247

NS

Total CARP score

H2

2

2.8907

0.93409

NS

Total CARP + ring score

H3

2

2.8358

0.24222

NS

Hypothesis

U statistic

P-value

Significance

Overall impression score

H4

554.5

0.42952

NS