condition mean min max ZT0-3 10.38485 10.38485 10.38485 ZT4-7 9.05141 9.05141 9.05141 ZT8-11 10.078555000000001 10.078555000000001 10.078555000000001 ZT12-15 12.9997 12.9997 12.9997 ZT16-19 12.817450000000001 12.817450000000001 12.817450000000001 ZT20-23 10.65785 10.65785 10.65785