condition mean min max ZT0-3 351.05 351.05 351.05 ZT4-7 272.1 272.1 272.1 ZT8-11 337.54999999999995 337.54999999999995 337.54999999999995 ZT12-15 295.6 295.6 295.6 ZT16-19 335.8 335.8 335.8 ZT20-23 291.15 291.15 291.15