Table 4 Results of the ANOVA test.

From: Re-evaluation of excavation class limits for underground excavations based on new data

Groups

Sample Size

Total

Mean

Variance

Group-1 (RMR89)

16

868.45

54.27813

80.71298958

Group-2 (Q)

16

76.9

4.80625

13.346705

Group-3 (GSI)

16

950

59.375

220.65

Group-4 (σcm)

16

152.82

9.55125

96.954785

Source of variation

Sum of squares

Degre of freedom

Mean square

F-value

P-value

F criterion

Between Groups

39826.43

3

13275.48

128.9931707

4.00015E-26

2.758078296

Within Groups

6174.967

60

102.9161

   

Total

46001.4

63