condition mean min max ZT0-3 435.6 435.6 435.6 ZT4-7 521.1 521.1 521.1 ZT8-11 559.75 559.75 559.75 ZT12-15 683.55 683.55 683.55 ZT16-19 625.35 625.35 625.35 ZT20-23 526.35 526.35 526.35