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. 2009 Apr;22(2):133–137. doi: 10.1080/08998280.2009.11928493

Table 3.

Mann-Whitney analysis of the numeric score data

Test Assessment score Compressions score Ventilation score Total score
Mann-Whitney U 30.0 35.5 45.0 25.5
Wilcoxon W 121.0 126.5 136.0 116.5
Z –2.497 –2.178 –1.471 –2.606
Asymptotic significance (two-tailed) 0.013 0.029 0.141 0.009
Exact significance [two(one-tailed significance)] 0.030 0.067 0.232 0.012

∗Not corrected for ties. Grouping variable: video vs control group.