condition mean min max ZT0-3 424.04999999999995 424.04999999999995 424.04999999999995 ZT4-7 403.7 403.7 403.7 ZT8-11 370.54999999999995 370.54999999999995 370.54999999999995 ZT12-15 343.75 343.75 343.75 ZT16-19 394.05 394.05 394.05 ZT20-23 311.35 311.35 311.35