condition mean min max ZT0-3 42.644826 42.644826 42.644826 ZT4-7 52.118508 52.118508 52.118508 ZT8-11 41.014071 41.014071 41.014071 ZT12-15 33.036761 33.036761 33.036761 ZT16-19 37.24045 37.24045 37.24045 ZT20-23 67.889703 67.889703 67.889703