condition mean min max ZT0-3 344.6 344.6 344.6 ZT4-7 249.7 249.7 249.7 ZT8-11 322.2 322.2 322.2 ZT12-15 430.04999999999995 430.04999999999995 430.04999999999995 ZT16-19 481.25 481.25 481.25 ZT20-23 319.5 319.5 319.5