condition mean min max ZT0-3 25.9876 25.9876 25.9876 ZT4-7 12.87412 12.87412 12.87412 ZT8-11 29.76145 29.76145 29.76145 ZT12-15 66.93090000000001 66.93090000000001 66.93090000000001 ZT16-19 76.24780000000001 76.24780000000001 76.24780000000001 ZT20-23 42.69385 42.69385 42.69385