condition mean min max ZT0-3 86.37695000000001 86.37695000000001 86.37695000000001 ZT4-7 72.61088333333333 72.61088333333333 72.61088333333333 ZT8-11 75.27915 75.27915 75.27915 ZT12-15 70.11575 70.11575 70.11575 ZT16-19 91.67205 91.67205 91.67205 ZT20-23 108.2864 108.2864 108.2864