condition mean min max ZT0-3 0.08806605 0.08757690000000001 0.0885552 ZT4-7 0.1777045 0.1777045 0.1777045 ZT8-11 0.24594349999999998 0.24594349999999998 0.24594349999999998 ZT12-15 0 0 0 ZT16-19 0.414095 0.414095 0.414095 ZT20-23 0.39570649999999996 0.39570649999999996 0.39570649999999996