condition mean min max ZT0-3 0.1541195 0.103713 0.20452599999999999 ZT4-7 0.309634 0.309634 0.309634 ZT8-11 0.2048505 0.2048505 0.2048505 ZT12-15 0 0 0 ZT16-19 0.408319 0.408319 0.408319 ZT20-23 0.8191364999999999 0.8191364999999999 0.8191364999999999