condition mean min max ZT0-3 26.693466 26.693466 26.693466 ZT4-7 34.7576445 34.7576445 34.7576445 ZT8-11 13.1096055 13.1096055 13.1096055 ZT12-15 10.057466000000002 10.057466000000002 10.057466000000002 ZT16-19 12.6849955 12.6849955 12.6849955 ZT20-23 11.110306 11.110306 11.110306