condition mean min max ZT0-3 12.887550000000001 12.887550000000001 12.887550000000001 ZT4-7 13.22255 13.22255 13.22255 ZT8-11 7.27515 7.27515 7.27515 ZT12-15 6.37687 6.37687 6.37687 ZT16-19 13.534749999999999 13.534749999999999 13.534749999999999 ZT20-23 13.011199999999999 13.011199999999999 13.011199999999999