condition mean min max ZT0-3 0.36176575 0.243446 0.48008550000000005 ZT4-7 0.0 0.0 0.0 ZT8-11 0.247372 0.247372 0.247372 ZT12-15 0 0 0 ZT16-19 0.238669 0.238669 0.238669 ZT20-23 0.0 0.0 0.0