condition mean min max ZT0-3 5.899195000000001 5.899195000000001 5.899195000000001 ZT4-7 2.07849 2.07849 2.07849 ZT8-11 3.65611 3.65611 3.65611 ZT12-15 3.5698 3.5698 3.5698 ZT16-19 7.11115 7.11115 7.11115 ZT20-23 5.6795100000000005 5.6795100000000005 5.6795100000000005