condition mean min max ZT0-3 9.68315 9.68315 9.68315 ZT4-7 6.296855000000001 6.296855000000001 6.296855000000001 ZT8-11 6.287485 6.287485 6.287485 ZT12-15 6.572815 6.572815 6.572815 ZT16-19 10.24411 10.24411 10.24411 ZT20-23 8.66856 8.66856 8.66856