condition mean min max ZT0-3 11.03081 11.03081 11.03081 ZT4-7 11.4096805 11.4096805 11.4096805 ZT8-11 12.9963415 12.9963415 12.9963415 ZT12-15 11.8490625 11.8490625 11.8490625 ZT16-19 12.779109 12.779109 12.779109 ZT20-23 13.791847 13.791847 13.791847