condition mean min max ZT0-3 10.325800000000001 10.325800000000001 10.325800000000001 ZT4-7 7.446785 7.446785 7.446785 ZT8-11 8.543855 8.543855 8.543855 ZT12-15 9.50506 9.50506 9.50506 ZT16-19 11.636600000000001 11.636600000000001 11.636600000000001 ZT20-23 10.52595 10.52595 10.52595