condition mean min max ZT0-3 704.817651 704.817651 704.817651 ZT4-7 721.4076990000001 721.4076990000001 721.4076990000001 ZT8-11 778.076596 778.076596 778.076596 ZT12-15 812.704227 812.704227 812.704227 ZT16-19 954.263467 954.263467 954.263467 ZT20-23 907.390904 907.390904 907.390904