condition mean min max ZT0-3 1.3044866666666668 0.0 3.91346 ZT4-7 0.0 0.0 0.0 ZT8-11 3.771835 3.771835 3.771835 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0