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Table 4 Statistical presentation of the input–output variables of thermal power

From: Energy efficiency in China: optimization and comparison between hydropower and thermal power

Variable Mean Std. dev Max Min
Descriptive statistical analysis of thermal power
 Input
  Installed capacity 3290.42 2406.95 10,335.00 235.00
  Energy 4660.97 3714.04 15,427.17 515.66
  Hours 4450.53 895.96 6173.00 1405.00
  Labor 12.99 7.04 32.18 1.85
 Output
  Generation capacity 1575.70 1395.59 7555.00 136.00
 Undesirable output
  CO2 11,424.99 9126.17 38,179.86 1212.11
Descriptive statistical analysis of hydropower
 Input
  Installed capacity 1110.40 1589.65 7714.00 43.00
  Energy 1123.53 1872.87 9236.01 12.28
  Hours 2653.93 1152.39 4599.00 355.00
  Labor 13.59 6.90 32.18 1.85
 Output
  Generation capacity 371.15 634.39 3164.00 4.50