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Table 19 Descriptive statistics of the unit test case metrics (Univariate clustering - CBO)

From: A metrics suite for JUnit test code: a multiple case study on open source software

 

CBO

Cluster 1

Cluster 2

Cluster 3

Cluster 4

Cluster 5

 

Nb. Obs.

506

284

153

64

20

TLOC

Min

6

9

12

18

16

Max

1620

2379

2624

1353

4063

Mean (μ)

91.81

175.62

236.54

149

477.85

Std. Dev (σ)

144.91

298.76

421.83

206.07

854.09

Coef. of var (C v  = σ/μ)

1.578

1.701

1.783

1.383

1.787

TASSERT

Min

0

0

0

1

1

Max

615

1058

1156

305

391

Mean (μ)

20.32

46.26

65.52

38.31

93.3

Std. Dev (σ)

42.41

116.36

161.77

58.25

101.53

Coef. of var (C v  = σ/μ)

2.087

2.515

2.469

1.52

1.088

TDATA

Min

0

0

0

0

0

Max

482

393

482

223

758

Mean (μ)

12.84

25.68

33.76

22.05

70.35

Std. Dev (σ)

31.17

52.80

67.72

30.42

161.49

Coef. of var (C v  = σ/μ)

2.427

2.056

2.006

1.38

2.295

TINVOK

Min

0

0

3

1

6

Max

175

401

399

190

516

Mean (μ)

25.22

38.76

54.06

35.69

84.05

Std. Dev (σ)

26.18

42.52

59.67

30.24

107.34

Coef. of var (C v  = σ/μ)

1.038

1.097

1.104

0.847

1.277

TNOO

Min

0

1

1

1

1

Max

164

242

238

54

148

Mean (μ)

6.76

11.05

19.46

8.66

21.85

Std. Dev (σ)

13.15

22.79

37.89

10.39

33.04

Coef. of var (C v  = σ/μ)

1.941

2.063

1.947

1.2

1.512