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Table 1 Statistical analysis of pre-lab and post-lab results

From: Predator Escape: An Ecologically Realistic Scenario for the Evolutionary Origins of Multicellularity

Question number School level Mann–Whitney U p value Fraction bootstrapped runs in which post-lab > pre-lab (%)
1 HS <0.0001* 100
2 HS 0.0882 95.7
3 HS <0.0001* 97.1
4 HS 0.0509 96.5
5 HS 0.0463 96.9
6 HS 0.0011* 97.3
7 HS 0.0211 97.0
8 HS 0.2357 95.7
1 Uni <0.0001* 99.9
2 Uni <0.0001* 99.9
3 Uni <0.0001* 99.9
4 Uni 0.0027* 99.9
5 Uni 0.0056* 99.9
6 Uni <0.0001* 99.9
7 Uni 0.0465 97.9
8 Uni <0.0001* 98.2
  1. Scores for individual questions were not normally distributed, so we performed a non-parametric Mann–Whitney U test to compare the means of pre-lab and post-lab results (column 3).
  2. * Denotes significance at the α = 0.05 level after Bonferroni correction for multiple-comparisons (threshold for significance is p = 0.05/8). We ran 100,000 bootstrap simulations on each pre- and post-lab assessment and report the fraction of runs in which the post-lab score was greater than the pre-lab score (column 4). Sample sizes for HS pre-lab, HS post-lab, Uni pre-lab, and Uni post-lab assessments were 242, 119, 423, and 175, respectively.