condition mean min max ZT0-3 0.721226 0.383542 1.05891 ZT4-7 0.99407 0.99407 0.99407 ZT8-11 1.1454849999999999 1.1454849999999999 1.1454849999999999 ZT12-15 0 0 0 ZT16-19 1.5082244999999999 1.5082244999999999 1.5082244999999999 ZT20-23 1.211705 1.211705 1.211705