condition mean min max ZT0-3 0.22631962500000002 0.190982 0.26165725 ZT4-7 0.229409 0.229409 0.229409 ZT8-11 0.46155250000000003 0.46155250000000003 0.46155250000000003 ZT12-15 0 0 0 ZT16-19 0.262666 0.262666 0.262666 ZT20-23 0.3393525 0.3393525 0.3393525