condition mean min max ZT0-3 260.5 260.5 260.5 ZT4-7 53.7 53.7 53.7 ZT8-11 64.85 64.85 64.85 ZT12-15 131.15 131.15 131.15 ZT16-19 171.8 171.8 171.8 ZT20-23 147.2 147.2 147.2