condition mean min max ZT0-3 6.03249 6.03249 6.03249 ZT4-7 4.52135 4.52135 4.52135 ZT8-11 5.631824999999999 5.631824999999999 5.631824999999999 ZT12-15 4.25095 4.25095 4.25095 ZT16-19 4.17735 4.17735 4.17735 ZT20-23 4.69262 4.69262 4.69262