condition mean min max ZT0-3 72.062875 70.4727 73.65305000000001 ZT4-7 74.7163 74.7163 74.7163 ZT8-11 97.16345 97.16345 97.16345 ZT12-15 0 0 0 ZT16-19 103.70150000000001 103.70150000000001 103.70150000000001 ZT20-23 92.08155 92.08155 92.08155