condition mean min max ZT0-3 35.1457268175 25.40467243 44.886781205 ZT4-7 61.325490884999994 52.397244355 70.25373741499999 ZT8-11 62.028871447499995 61.834982535 62.222760359999995 ZT12-15 15.13914753875 4.8323715400000005 25.4459235375 ZT16-19 7.52154711625 7.4766979970000005 7.5663962355 ZT20-23 8.464391811999999 8.260562246 8.668221378