condition mean min max ZT0-3 11.248308572500001 10.89594431 11.600672835000001 ZT4-7 30.455959135 21.443536995 39.468381275 ZT8-11 49.8758791975 46.88316114 52.868597255 ZT12-15 49.019969085 47.924764335 50.11517383499999 ZT16-19 48.14327287 41.550765825 54.735779914999995 ZT20-23 71.903549755 63.570249785 80.236849725