condition mean min max ZT0-3 13.456949999999999 13.456949999999999 13.456949999999999 ZT4-7 13.60965 13.60965 13.60965 ZT8-11 13.02645 13.02645 13.02645 ZT12-15 11.6033 11.6033 11.6033 ZT16-19 9.169789999999999 9.169789999999999 9.169789999999999 ZT20-23 11.483 11.483 11.483