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Table 4 T-test of size of graduate students by factors

From: The impact of graduate students on research productivity in Korea

  Gender Age Region
Disp Group Obs Avg. Group Obs Avg. Group Obs Avg.
H Male 6,780 1.186(0.063) Senior 5,409 1.211(0.071)) Non-capital 4,722 0.881(0.062)
Female 2,175 0.654(0.069) Junior 3,546 0.822(0.066)) capital Area 4,233 1.253(0.082)
combined 8,955 1.057(0.050) combined 8,955 1.057(0.050) combined 8,955 1.057(0.050)
diff   0.532(0.118) diff   0.389(0.103) diff   −0.372(0.101)
t-value 4.5275** t-value 3.7735* t-value −3.6778**
SS Male 10,683 1.937(0.059) Senior 7,649 2.015(0.075) Non-capital 7,108 1.665(0.067)
Female 2,124 1.834(0.131) Junior 5,158 1.779(0.075) capital Area 5,699 2.238(0.087)
combined 12,807 1.92(0.054) combined 12,807 1.920(0.054) combined 12,807 1.92(0.054)
diff   0.102(0.145) diff   0.236(0.110) diff   −0.573(0.108)
t-value 0.7069 t-value 2.1474** t-value −5.2854**
NS Male 4,385 5.752(0.170) Senior 4,027 4.910(0.166) Non-capital 3,406 5.257(0.182)
Female 1,128 4.105(0.278) Junior 1,486 6.785(0.304) capital Area 2,107 5.671(0.248)
combined 5,513 5.415(0.147) combined 5,513 5.415(0.147) combined 5,513 5.415(0.147)
diff   1.648(0.363) diff   −1.875(0.330) diff   −0.414(0.302)
t-value 4.5351** t-value −5.6817** t-value −1.3709
E Male 10,466 7.419(0.125) Senior 7,736 7.122(0.144) Non-capital 7,083 7.328(0.148)
Female 408 5.478(0.526) Junior 3,138 7.897(0.225) capital Area 3,791 7.38(0.214)
combined 10,874 7.346(0.122) combined 10,874 7.346(0.122) combined 10,874 7.346(0.122)
diff   1.941(0.640) diff   −0.775(0.268) diff   −0.053(0.255)
t-value 3.0336** t-value −2.8886** t-value −0.2070
  1. H humanities, SS social science, NS natural science, E engineering
  2. * p <0.05, ** p <0.01, the value of () is standard errors