condition mean min max ZT0-3 0.193544575 0.14739315 0.239696 ZT4-7 0.393537 0.393537 0.393537 ZT8-11 0.39120499999999997 0.39120499999999997 0.39120499999999997 ZT12-15 0 0 0 ZT16-19 0.8258384999999999 0.8258384999999999 0.8258384999999999 ZT20-23 0.24328145 0.24328145 0.24328145