condition mean min max ZT0-3 335.9 335.9 335.9 ZT4-7 313.2 313.2 313.2 ZT8-11 339.55 339.55 339.55 ZT12-15 337.70000000000005 337.70000000000005 337.70000000000005 ZT16-19 378.4 378.4 378.4 ZT20-23 340.4 340.4 340.4