condition mean min max ZT0-3 0.3305945 0.0 0.5202415 ZT4-7 0.2290495 0.2290495 0.2290495 ZT8-11 0.316606 0.316606 0.316606 ZT12-15 0.7049920000000001 0.658157 0.751827 ZT16-19 0.605714 0.605714 0.605714 ZT20-23 0.5518115 0.5518115 0.5518115