condition mean min max ZT0-3 20.74225 20.74225 20.74225 ZT4-7 16.1197 16.1197 16.1197 ZT8-11 36.414699999999996 36.414699999999996 36.414699999999996 ZT12-15 48.1888 48.1888 48.1888 ZT16-19 48.67295 48.67295 48.67295 ZT20-23 31.45435 31.45435 31.45435