condition mean min max ZT0-3 72.522767 72.522767 72.522767 ZT4-7 93.54898349999999 93.54898349999999 93.54898349999999 ZT8-11 151.047439 151.047439 151.047439 ZT12-15 108.032039 108.032039 108.032039 ZT16-19 127.350263 127.350263 127.350263 ZT20-23 77.2124875 77.2124875 77.2124875