condition mean min max ZT0-3 0.4674215 0.252181 0.682662 ZT4-7 0.8760745 0.8760745 0.8760745 ZT8-11 2.2127350000000003 2.2127350000000003 2.2127350000000003 ZT12-15 0 0 0 ZT16-19 2.664975 2.664975 2.664975 ZT20-23 1.93079 1.93079 1.93079