condition mean min max ZT0-3 5.6327625 5.630185 5.635339999999999 ZT4-7 5.6987749999999995 5.6987749999999995 5.6987749999999995 ZT8-11 5.560790000000001 5.560790000000001 5.560790000000001 ZT12-15 0 0 0 ZT16-19 6.0525199999999995 6.0525199999999995 6.0525199999999995 ZT20-23 6.94086 6.94086 6.94086