condition mean min max ZT0-3 0.31603385575 0.140726357 0.49134135449999994 ZT4-7 1.89399322825 1.1136520855 2.674334371 ZT8-11 5.911372299 4.608080745500001 7.2146638525 ZT12-15 10.024234546750002 9.248446854 10.8000222395 ZT16-19 6.909510763749999 6.3651594035 7.453862124 ZT20-23 9.02755307475 8.567625163 9.4874809865