condition mean min max ZT0-3 158.001288 158.001288 158.001288 ZT4-7 118.84886 118.84886 118.84886 ZT8-11 151.735528 151.735528 151.735528 ZT12-15 143.7320565 143.7320565 143.7320565 ZT16-19 190.15859 190.15859 190.15859 ZT20-23 235.55442499999998 235.55442499999998 235.55442499999998