condition mean min max ZT0-3 170.907264 170.907264 170.907264 ZT4-7 138.93813649999998 138.93813649999998 138.93813649999998 ZT8-11 121.23141749999999 121.23141749999999 121.23141749999999 ZT12-15 114.49439000000001 114.49439000000001 114.49439000000001 ZT16-19 121.55675099999999 121.55675099999999 121.55675099999999 ZT20-23 123.2070825 123.2070825 123.2070825