condition mean min max ZT0-3 3.10997 3.0138350000000003 3.206105 ZT4-7 3.4790150000000004 3.4790150000000004 3.4790150000000004 ZT8-11 4.5740549999999995 4.5740549999999995 4.5740549999999995 ZT12-15 0 0 0 ZT16-19 5.152185 5.152185 5.152185 ZT20-23 4.802235 4.802235 4.802235