condition mean min max ZT0-3 0.016329 0.0 0.032658 ZT4-7 0.13112600000000002 0.13112600000000002 0.13112600000000002 ZT8-11 0.0323535 0.0323535 0.0323535 ZT12-15 0 0 0 ZT16-19 0.03224435 0.03224435 0.03224435 ZT20-23 0.09689325 0.09689325 0.09689325