condition mean min max ZT0-3 562.7 562.7 562.7 ZT4-7 419.5 419.5 419.5 ZT8-11 335.4 335.4 335.4 ZT12-15 390.95 390.95 390.95 ZT16-19 559.35 559.35 559.35 ZT20-23 526.1 526.1 526.1