condition mean min max ZT0-3 19.429850000000002 19.429850000000002 19.429850000000002 ZT4-7 13.5306 13.5306 13.5306 ZT8-11 7.14942 7.14942 7.14942 ZT12-15 5.664115 5.664115 5.664115 ZT16-19 16.0429 16.0429 16.0429 ZT20-23 18.873350000000002 18.873350000000002 18.873350000000002