condition mean min max ZT0-3 22.36205 16.9573 25.47055 ZT4-7 15.313099999999999 15.313099999999999 15.313099999999999 ZT8-11 19.962400000000002 19.962400000000002 19.962400000000002 ZT12-15 33.501575 31.55955 35.4436 ZT16-19 30.22815 30.22815 30.22815 ZT20-23 30.728699999999996 30.728699999999996 30.728699999999996