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Table S3

Duncan multiple comparison tests for the GLR obtained from vibration in LR plane at different crack lenghth (GPa)–Based on 18 observations.

Subsets for alpha = 0.05
Crack Size
1 2
18 cm 0.083
12 cm 0.250
6 cm 0.295
Zero 0.730

Means for groups in homogeneous subsets are displayed. a Uses Harmonic Mean Sample Size = 18.