condition mean min max ZT0-3 40.42528088 33.1720311 47.67853066 ZT4-7 64.983008765 62.40566286 67.56035467 ZT8-11 110.74033205250001 92.62717766 128.85348644500002 ZT12-15 95.656216075 73.81302982 117.49940233 ZT16-19 61.361118665 49.186856614999996 73.535380715 ZT20-23 31.784352867499997 29.301352279999996 34.267353455