condition mean min max ZT0-3 76.514542 76.514542 76.514542 ZT4-7 72.107445 72.107445 72.107445 ZT8-11 105.538144 105.538144 105.538144 ZT12-15 122.744031 122.744031 122.744031 ZT16-19 124.554255 124.554255 124.554255 ZT20-23 97.86434650000001 97.86434650000001 97.86434650000001