condition mean min max ZT0-3 55.38358462 26.15757241 84.60959683 ZT4-7 20.788767630000002 19.701512045 21.876023215 ZT8-11 27.739220205000002 19.67169256 35.80674785 ZT12-15 42.24707424 39.58396096 44.91018752 ZT16-19 31.429625615 28.83609593 34.0231553 ZT20-23 43.388265265 35.00289325 51.77363728