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Mann–Whitney test statistic result for the influence of the type of substrate and type of treatment on the tensile bond strength.
| Type of Substrate (Concrete or Ceramic) | Type of Treatment (Roughcast or Mortar Coating) | |
|---|---|---|
| Tensile bond strength | Tensile bond strength | |
| Mann–Whitney, U | 5224.000 | 7180.500 |
| Wilcoxon, W | 15,664.000 | 17,620.500 |
| Z | −7.280 | −4.511 |
| Significance Sig. (2 tales) | <0.001 | <0.001 |
