condition mean min max ZT0-3 53.8 53.8 53.8 ZT4-7 90.8 90.8 90.8 ZT8-11 109.1 109.1 109.1 ZT12-15 86.9 86.9 86.9 ZT16-19 93.35 93.35 93.35 ZT20-23 58.65 58.65 58.65