condition mean min max ZT0-3 10.290138 10.290138 10.290138 ZT4-7 10.7588155 10.7588155 10.7588155 ZT8-11 9.958432 9.958432 9.958432 ZT12-15 10.290138 10.290138 10.290138 ZT16-19 10.323101000000001 10.323101000000001 10.323101000000001 ZT20-23 10.271154500000002 10.271154500000002 10.271154500000002