condition mean min max ZT0-3 0.09313033333333333 0.0 0.279391 ZT4-7 0.0 0.0 0.0 ZT8-11 0.8618899999999999 0.8618899999999999 0.8618899999999999 ZT12-15 0.61758725 0.0 1.2351745 ZT16-19 0.556385 0.556385 0.556385 ZT20-23 0.627385 0.627385 0.627385