condition mean min max ZT0-3 0.22225099999999998 0.21303899999999998 0.23146299999999997 ZT4-7 0.948476 0.948476 0.948476 ZT8-11 0.900716 0.900716 0.900716 ZT12-15 0 0 0 ZT16-19 0.5031045 0.5031045 0.5031045 ZT20-23 0.336584 0.336584 0.336584