condition mean min max ZT0-3 10.5734 10.5734 10.5734 ZT4-7 10.125972 10.125972 10.125972 ZT8-11 10.2440165 10.2440165 10.2440165 ZT12-15 10.5848245 10.5848245 10.5848245 ZT16-19 9.5751645 9.5751645 9.5751645 ZT20-23 8.9288405 8.9288405 8.9288405