condition mean min max ZT0-3 0.36652975 0.344935 0.3881245 ZT4-7 0.3982185 0.3982185 0.3982185 ZT8-11 0.21695599999999998 0.21695599999999998 0.21695599999999998 ZT12-15 0 0 0 ZT16-19 0.436295 0.436295 0.436295 ZT20-23 0.6050845 0.6050845 0.6050845