condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0419814 0.0419814 0.0419814 ZT16-19 0.033555999999999996 0.033555999999999996 0.033555999999999996 ZT20-23 0.0 0.0 0.0