condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0100216 0.0100216 0.0100216 ZT8-11 0.00794105 0.00794105 0.00794105 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.018078466666666668 0.018078466666666668 0.018078466666666668