condition mean min max ZT0-3 12.675275000000001 12.624600000000001 12.725950000000001 ZT4-7 15.59815 15.59815 15.59815 ZT8-11 12.2485 12.2485 12.2485 ZT12-15 0 0 0 ZT16-19 13.7173 13.7173 13.7173 ZT20-23 17.253149999999998 17.253149999999998 17.253149999999998