condition mean min max ZT0-3 23.80095 23.80095 23.80095 ZT4-7 31.247500000000002 31.247500000000002 31.247500000000002 ZT8-11 10.42695 10.42695 10.42695 ZT12-15 11.79945 11.79945 11.79945 ZT16-19 10.474150000000002 10.474150000000002 10.474150000000002 ZT20-23 28.324350000000003 28.324350000000003 28.324350000000003