condition mean min max ZT0-3 0.307023 0.177377 0.436669 ZT4-7 0.5271060000000001 0.5271060000000001 0.5271060000000001 ZT8-11 2.3730700000000002 2.3730700000000002 2.3730700000000002 ZT12-15 0 0 0 ZT16-19 1.07822 1.07822 1.07822 ZT20-23 0.4385525 0.4385525 0.4385525