condition mean min max ZT0-3 17.3236 11.856349999999999 21.1119 ZT4-7 9.841255 9.841255 9.841255 ZT8-11 8.646585 8.646585 8.646585 ZT12-15 12.3998 12.3655 12.4341 ZT16-19 13.65895 13.65895 13.65895 ZT20-23 19.794 19.794 19.794