condition mean min max ZT0-3 236.9 236.9 236.9 ZT4-7 293.4 293.4 293.4 ZT8-11 326.35 326.35 326.35 ZT12-15 330.95000000000005 330.95000000000005 330.95000000000005 ZT16-19 375.25 375.25 375.25 ZT20-23 340.3 340.3 340.3