condition mean min max ZT0-3 11.246044 11.246044 11.246044 ZT4-7 10.962977500000001 10.962977500000001 10.962977500000001 ZT8-11 10.885563000000001 10.885563000000001 10.885563000000001 ZT12-15 11.165274 11.165274 11.165274 ZT16-19 10.3799755 10.3799755 10.3799755 ZT20-23 10.4398865 10.4398865 10.4398865