condition mean min max ZT0-3 16.8996 16.8996 16.8996 ZT4-7 12.0554 12.0554 12.0554 ZT8-11 10.55213 10.55213 10.55213 ZT12-15 14.594999999999999 14.594999999999999 14.594999999999999 ZT16-19 20.1051 20.1051 20.1051 ZT20-23 18.7701 18.7701 18.7701