condition mean min max ZT0-3 57.860875 53.692 62.02975 ZT4-7 42.1388 42.1388 42.1388 ZT8-11 47.1852 47.1852 47.1852 ZT12-15 0 0 0 ZT16-19 70.40005 70.40005 70.40005 ZT20-23 59.209900000000005 59.209900000000005 59.209900000000005