condition mean min max ZT0-3 53.75 53.75 53.75 ZT4-7 17.8 17.8 17.8 ZT8-11 102.19999999999999 102.19999999999999 102.19999999999999 ZT12-15 57.55 57.55 57.55 ZT16-19 55.9 55.9 55.9 ZT20-23 32.1 32.1 32.1