condition mean min max ZT0-3 158.89233333333334 128.6415 215.8665 ZT4-7 170.786 170.786 170.786 ZT8-11 91.6628 91.6628 91.6628 ZT12-15 73.54842500000001 71.7895 75.30735 ZT16-19 59.1934 59.1934 59.1934 ZT20-23 68.68495 68.68495 68.68495