condition mean min max ZT0-3 0.07645155000000001 0.07645155000000001 0.07645155000000001 ZT4-7 0.19379249999999998 0.19379249999999998 0.19379249999999998 ZT8-11 0.1843605 0.1843605 0.1843605 ZT12-15 0.3997265 0.3997265 0.3997265 ZT16-19 0.253604 0.253604 0.253604 ZT20-23 0.25147200000000003 0.25147200000000003 0.25147200000000003