condition mean min max ZT0-3 0.21512375 0.185814 0.24443350000000003 ZT4-7 0.12199 0.12199 0.12199 ZT8-11 0.187154 0.187154 0.187154 ZT12-15 0 0 0 ZT16-19 0.3645525 0.3645525 0.3645525 ZT20-23 0.3671135 0.3671135 0.3671135