condition mean min max ZT0-3 35.7296 34.72575 36.73345 ZT4-7 26.055349999999997 26.055349999999997 26.055349999999997 ZT8-11 23.4213 23.4213 23.4213 ZT12-15 0 0 0 ZT16-19 32.97905 32.97905 32.97905 ZT20-23 35.281549999999996 35.281549999999996 35.281549999999996