condition mean min max ZT0-3 260.05 260.05 260.05 ZT4-7 117.8 117.8 117.8 ZT8-11 108.6 108.6 108.6 ZT12-15 159.15 159.15 159.15 ZT16-19 245.14999999999998 245.14999999999998 245.14999999999998 ZT20-23 326.55 326.55 326.55