condition mean min max ZT0-3 66.1 66.1 66.1 ZT4-7 65.2 65.2 65.2 ZT8-11 47.5 47.5 47.5 ZT12-15 60.7 60.7 60.7 ZT16-19 86.3 86.3 86.3 ZT20-23 64.1 64.1 64.1