condition mean min max ZT0-3 220.564033 220.564033 220.564033 ZT4-7 95.994145 95.994145 95.994145 ZT8-11 83.0294495 83.0294495 83.0294495 ZT12-15 210.2320565 210.2320565 210.2320565 ZT16-19 179.8318355 179.8318355 179.8318355 ZT20-23 332.8706385 332.8706385 332.8706385