condition mean min max ZT0-3 103.8342 103.8342 103.8342 ZT4-7 236.09412650000002 236.09412650000002 236.09412650000002 ZT8-11 258.024067 258.024067 258.024067 ZT12-15 248.2435645 248.2435645 248.2435645 ZT16-19 158.404152 158.404152 158.404152 ZT20-23 82.32793799999999 82.32793799999999 82.32793799999999