condition mean min max ZT0-3 263.1 263.1 263.1 ZT4-7 269.8 269.8 269.8 ZT8-11 313.5 313.5 313.5 ZT12-15 365.4 365.4 365.4 ZT16-19 293.95000000000005 293.95000000000005 293.95000000000005 ZT20-23 314.54999999999995 314.54999999999995 314.54999999999995