condition mean min max ZT0-3 8.09557 8.09557 8.09557 ZT4-7 9.574449000000001 9.574449000000001 9.574449000000001 ZT8-11 10.963327 10.963327 10.963327 ZT12-15 8.240714 8.240714 8.240714 ZT16-19 10.15999 10.15999 10.15999 ZT20-23 10.1195485 10.1195485 10.1195485