condition mean min max ZT0-3 0.5488390000000001 0.5488390000000001 0.5488390000000001 ZT4-7 0.3096765 0.3096765 0.3096765 ZT8-11 0.6210435000000001 0.6210435000000001 0.6210435000000001 ZT12-15 0.876833 0.876833 0.876833 ZT16-19 0.7005465 0.7005465 0.7005465 ZT20-23 0.6697649999999999 0.6697649999999999 0.6697649999999999