condition mean min max ZT0-3 0.7293937500000001 0.6213325 0.8374550000000001 ZT4-7 3.147925 3.147925 3.147925 ZT8-11 1.95834 1.95834 1.95834 ZT12-15 0 0 0 ZT16-19 0.570391 0.570391 0.570391 ZT20-23 0.7370190000000001 0.7370190000000001 0.7370190000000001