condition mean min max ZT0-3 10.6515 10.6515 10.6515 ZT4-7 8.16513 8.16513 8.16513 ZT8-11 7.226495 7.226495 7.226495 ZT12-15 7.860505 7.860505 7.860505 ZT16-19 13.515149999999998 13.515149999999998 13.515149999999998 ZT20-23 10.320450000000001 10.320450000000001 10.320450000000001