condition mean min max ZT0-3 85.55 85.55 85.55 ZT4-7 62.2 62.2 62.2 ZT8-11 65.3 65.3 65.3 ZT12-15 74.25 74.25 74.25 ZT16-19 56.35 56.35 56.35 ZT20-23 76.15 76.15 76.15