condition mean min max ZT0-3 11.03529 11.03529 11.03529 ZT4-7 9.80379 9.80379 9.80379 ZT8-11 10.40672 10.40672 10.40672 ZT12-15 8.713894999999999 8.713894999999999 8.713894999999999 ZT16-19 9.141135 9.141135 9.141135 ZT20-23 9.8078 9.8078 9.8078