condition mean min max ZT0-3 0.129023525 0.06383305 0.194214 ZT4-7 0.26018600000000003 0.26018600000000003 0.26018600000000003 ZT8-11 10.21877 10.21877 10.21877 ZT12-15 0 0 0 ZT16-19 0.28623200000000004 0.28623200000000004 0.28623200000000004 ZT20-23 0.2872085 0.2872085 0.2872085