condition mean min max ZT0-3 22.3864 17.461199999999998 25.49615 ZT4-7 34.83455 34.83455 34.83455 ZT8-11 42.8919 42.8919 42.8919 ZT12-15 111.949125 102.69575 121.20249999999999 ZT16-19 66.14605 66.14605 66.14605 ZT20-23 33.46785 33.46785 33.46785