condition mean min max ZT0-3 0.7081215 0.378519 1.0607415 ZT4-7 0.0603445 0.0603445 0.0603445 ZT8-11 0.3670735 0.3670735 0.3670735 ZT12-15 0.510301 0.2548825 0.7657195 ZT16-19 0.2918845 0.2918845 0.2918845 ZT20-23 0.5964389999999999 0.5964389999999999 0.5964389999999999