condition mean min max ZT0-3 465.91025 380.3535 551.467 ZT4-7 89.10985 89.10985 89.10985 ZT8-11 21.8185 21.8185 21.8185 ZT12-15 0 0 0 ZT16-19 96.92179999999999 96.92179999999999 96.92179999999999 ZT20-23 219.155 219.155 219.155