condition mean min max ZT0-3 95.31885 86.41120000000001 104.2265 ZT4-7 50.6295 50.6295 50.6295 ZT8-11 27.018050000000002 27.018050000000002 27.018050000000002 ZT12-15 0 0 0 ZT16-19 41.00555 41.00555 41.00555 ZT20-23 44.516549999999995 44.516549999999995 44.516549999999995