condition mean min max ZT0-3 6.38007 6.38007 6.38007 ZT4-7 5.227930000000001 5.227930000000001 5.227930000000001 ZT8-11 5.134315 5.134315 5.134315 ZT12-15 7.003515 7.003515 7.003515 ZT16-19 7.055345 7.055345 7.055345 ZT20-23 6.391795 6.391795 6.391795