condition mean min max ZT0-3 0.09931071666666667 0.07449215000000001 0.1468485 ZT4-7 0.14075569999999998 0.14075569999999998 0.14075569999999998 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0696745 0.0696745 0.0696745 ZT20-23 0.0400119 0.0400119 0.0400119