condition mean min max ZT0-3 14.22153 14.22153 14.22153 ZT4-7 13.282031 13.282031 13.282031 ZT8-11 11.8224575 11.8224575 11.8224575 ZT12-15 11.335932 11.335932 11.335932 ZT16-19 12.4939645 12.4939645 12.4939645 ZT20-23 12.544733 12.544733 12.544733