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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