condition mean min max ZT0-3 108.584711 108.584711 108.584711 ZT4-7 120.89700400000001 120.89700400000001 120.89700400000001 ZT8-11 132.0382705 132.0382705 132.0382705 ZT12-15 118.449241 118.449241 118.449241 ZT16-19 168.237171 168.237171 168.237171 ZT20-23 168.293786 168.293786 168.293786