condition mean min max ZT0-3 8.115857993750001 6.830136681500001 9.401579306 ZT4-7 5.7700037984999994 4.538720702 7.001286895 ZT8-11 11.07731031775 9.3431394355 12.8114812 ZT12-15 9.439326929500002 8.308930666 10.569723193000002 ZT16-19 4.2556126345 4.0092711355 4.5019541335 ZT20-23 4.69948361775 4.517229712000001 4.8817375235