condition mean min max ZT0-3 15.650533856666666 15.51639222 15.784675493333333 ZT4-7 30.338079901666667 27.257125833333333 33.41903397 ZT8-11 52.04802041 50.3170048 53.77903602 ZT12-15 68.20996400499999 66.20518797 70.21474004 ZT16-19 44.993245351666665 40.765543199999996 49.220947503333335 ZT20-23 34.154748925 33.26870583 35.04079202