condition mean min max ZT0-3 22.74755 22.02785 23.46725 ZT4-7 14.582650000000001 14.582650000000001 14.582650000000001 ZT8-11 21.5465 21.5465 21.5465 ZT12-15 0 0 0 ZT16-19 30.542099999999998 30.542099999999998 30.542099999999998 ZT20-23 18.04375 18.04375 18.04375