condition mean min max ZT0-3 65.481312 65.481312 65.481312 ZT4-7 71.3018565 71.3018565 71.3018565 ZT8-11 85.9285565 85.9285565 85.9285565 ZT12-15 82.65362400000001 82.65362400000001 82.65362400000001 ZT16-19 112.481245 112.481245 112.481245 ZT20-23 95.13212899999999 95.13212899999999 95.13212899999999