condition mean min max ZT0-3 334.519864 334.519864 334.519864 ZT4-7 327.54152799999997 327.54152799999997 327.54152799999997 ZT8-11 380.4845565 380.4845565 380.4845565 ZT12-15 423.3246855 423.3246855 423.3246855 ZT16-19 388.562337 388.562337 388.562337 ZT20-23 425.813579 425.813579 425.813579