condition mean min max ZT0-3 2.10147 2.10147 2.10147 ZT4-7 19.02375 19.02375 19.02375 ZT8-11 32.2164 32.2164 32.2164 ZT12-15 13.85505 13.85505 13.85505 ZT16-19 2.72147 2.72147 2.72147 ZT20-23 0.5242020000000001 0.5242020000000001 0.5242020000000001