condition mean min max ZT0-3 379.009045 379.009045 379.009045 ZT4-7 329.334203 329.334203 329.334203 ZT8-11 455.6828025 455.6828025 455.6828025 ZT12-15 485.431662 485.431662 485.431662 ZT16-19 891.162106 891.162106 891.162106 ZT20-23 625.0865415000001 625.0865415000001 625.0865415000001