condition mean min max ZT0-3 0.27777949999999996 0.277593 0.277966 ZT4-7 0.2740595 0.2740595 0.2740595 ZT8-11 1.6579774999999999 1.6579774999999999 1.6579774999999999 ZT12-15 0 0 0 ZT16-19 0.820072 0.820072 0.820072 ZT20-23 0.0 0.0 0.0