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Table 3 T-tests for average APC and publication time for journals and articles

From: ‘Predatory’ open access: a longitudinal study of article volumes and market characteristics

  100+ journal publisher 10–99 journal publisher 2–9 journal publisher Single-journal publisher
Average APC for journals     
  100+ journal publisher - P <0.05 P <0.05 P <0.05
  10–99 journal publisher - - P >0.05 P <0.05
  2–9 journal publisher - - - P <0.05
  Single-journal publisher - - - -
Average APC for articles published in 2010–2014  
  100+ journal publisher - P <0.05 P <0.05 P <0.05
  10–99 journal publisher - - P >0.05 P >0.05
  2–9 journal publisher - - - P <0.05
  Single-journal publisher - - - -
Average publication time for journals  
  100+ journal publisher - P >0.05 P >0.05 P >0.05
  10–99 journal publisher - - P >0.05 P <0.05
  2–9 journal publisher - - - P >0.05
  Single-journal publisher - - - -
Average publication time for articles published in 2014  
  100+ journal publisher - P >0.05 P >0.05 P <0.05
  10–99 journal publisher - - P <0.05 P <0.05
  2–9 journal publisher - - - P >0.05
  Single-journal publisher - - - -