condition mean min max ZT0-3 11.1828 11.1828 11.1828 ZT4-7 10.680955 10.680955 10.680955 ZT8-11 10.88015 10.88015 10.88015 ZT12-15 10.94145 10.94145 10.94145 ZT16-19 10.8408 10.8408 10.8408 ZT20-23 10.8254 10.8254 10.8254