condition mean min max ZT0-3 235.97689 235.97689 235.97689 ZT4-7 220.9989755 220.9989755 220.9989755 ZT8-11 257.7511415 257.7511415 257.7511415 ZT12-15 295.0794045 295.0794045 295.0794045 ZT16-19 289.370587 289.370587 289.370587 ZT20-23 277.4145795 277.4145795 277.4145795