condition mean min max ZT0-3 334.37814 334.37814 334.37814 ZT4-7 165.31487900000002 165.31487900000002 165.31487900000002 ZT8-11 77.1853685 77.1853685 77.1853685 ZT12-15 63.22250149999999 63.22250149999999 63.22250149999999 ZT16-19 332.287572 332.287572 332.287572 ZT20-23 449.09332199999994 449.09332199999994 449.09332199999994