condition mean min max ZT0-3 1.24118 1.2232599999999998 1.2591 ZT4-7 1.141465 1.141465 1.141465 ZT8-11 1.330195 1.330195 1.330195 ZT12-15 0 0 0 ZT16-19 2.15516 2.15516 2.15516 ZT20-23 1.81511 1.81511 1.81511