condition mean min max ZT0-3 9.802105 9.802105 9.802105 ZT4-7 10.5462255 10.5462255 10.5462255 ZT8-11 12.515223 12.515223 12.515223 ZT12-15 12.5752255 12.5752255 12.5752255 ZT16-19 12.0143655 12.0143655 12.0143655 ZT20-23 11.730028 11.730028 11.730028