condition mean min max ZT0-3 21.903190855 17.45372095 26.35266076 ZT4-7 11.75848667725 11.711874634499999 11.80509872 ZT8-11 14.3110261325 11.994152215 16.62790005 ZT12-15 16.81798759 16.32748358 17.3084916 ZT16-19 20.5237393425 20.280412345000002 20.76706634 ZT20-23 20.6641108 17.631067485 23.697154115