condition mean min max ZT0-3 833.75 833.75 833.75 ZT4-7 675.8 675.8 675.8 ZT8-11 787.15 787.15 787.15 ZT12-15 799.6 799.6 799.6 ZT16-19 721.45 721.45 721.45 ZT20-23 925.25 925.25 925.25