condition mean min max ZT0-3 11.0046725 9.378165 12.63118 ZT4-7 13.46695 13.46695 13.46695 ZT8-11 40.13955 40.13955 40.13955 ZT12-15 0 0 0 ZT16-19 34.19365 34.19365 34.19365 ZT20-23 18.9591 18.9591 18.9591