condition mean min max ZT0-3 11.559435 11.559435 11.559435 ZT4-7 12.559900500000001 12.559900500000001 12.559900500000001 ZT8-11 12.0581405 12.0581405 12.0581405 ZT12-15 11.790402 11.790402 11.790402 ZT16-19 11.9292155 11.9292155 11.9292155 ZT20-23 12.546688 12.546688 12.546688