condition mean min max ZT0-3 24.25 24.25 24.25 ZT4-7 10.4 10.4 10.4 ZT8-11 12.2 12.2 12.2 ZT12-15 9.85 9.85 9.85 ZT16-19 53.7 53.7 53.7 ZT20-23 32.2 32.2 32.2