condition mean min max ZT0-3 792.35 792.35 792.35 ZT4-7 1047.1 1047.1 1047.1 ZT8-11 906.9 906.9 906.9 ZT12-15 768.8 768.8 768.8 ZT16-19 703.4000000000001 703.4000000000001 703.4000000000001 ZT20-23 703.55 703.55 703.55