condition mean min max ZT0-3 0.06350037975 0.0 0.1270007595 ZT4-7 1.35981565125 0.7598026444999999 1.959828658 ZT8-11 4.49843480625 3.9583854169999997 5.0384841955 ZT12-15 9.221330000750001 7.3104980375 11.132161964 ZT16-19 9.93004211275 8.9786827555 10.88140147 ZT20-23 14.838634885 11.267474109999998 18.40979566