condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.107166498 0.0 0.214332996 ZT8-11 0.2777696038333333 0.0 0.5555392076666666 ZT12-15 0.0 0.0 0.0 ZT16-19 0.31553275966666666 0.0 0.6310655193333333 ZT20-23 0.0 0.0 0.0