condition mean min max ZT0-3 0.108917 0.0 0.217834 ZT4-7 0.0 0.0 0.0 ZT8-11 0.453968 0.453968 0.453968 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.2196115 0.2196115 0.2196115