condition mean min max ZT0-3 87.6265 81.9924 93.2606 ZT4-7 98.9169 98.9169 98.9169 ZT8-11 137.66750000000002 137.66750000000002 137.66750000000002 ZT12-15 0 0 0 ZT16-19 117.1965 117.1965 117.1965 ZT20-23 97.8837 97.8837 97.8837