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Table 3 Mean differences in selected variables between paired ARN and CBS coupes harvested from 2003 to 2009, shown for comparison with recent results

From: Variable retention in Tasmania, Australia: trends over 16 years of monitoring and adaptive management

Variable ARN mean CBS mean Mean difference (ARN-CBS) Test used Test statistic Number p value
Coupes harvested from 2003 to 2009
 Perimeter (m) 4642 2836 1806 Paired t 5.12 31 < .0001
 Harvested area (ha) 20.7 28.5 − 7.7 Paired t − 2.5 31 0.0175
 Perimeter-to-area ratio (m ha−1) 224 127 97.5 Wilcoxon 465 31 < .0001
 Forest influence (%) 73 33 41 Paired t 8.66 31 < .0001
 Retention (%) 30 0 30 Wilcoxon 378 31 < .0001
 Burnt seedbed (%) 63 68 − 6 Paired t − 2.04 31 0.025*
 Stocking age 1 year (%) 69 69 − 0.5 Paired t − 0.14 31 0.445
 Density age 1 year (sph) 3633 3083 550 Wilcoxon 259 31 0.42
  1. Means for each silvicultural system are shown as well as the mean difference between the paired coupes (ARN–CBS). Tests used, test statistics, and p values are shown, with significant difference indicated in italics. Reprinted from Scott et al. (2012b) and Scott et al. (2013), with permission from Elsevier, and from Scott et al. (2015), with permission from Taylor & Francis (https://www.tandfonline.com/)
  2. *One-tailed p