condition mean min max ZT0-3 3.8183041247499996 1.8618094805 5.774798768999999 ZT4-7 0.28040164224999997 0.2217968285 0.339006456 ZT8-11 0.14942533875 0.0 0.2988506775 ZT12-15 1.040005443 0.7253238845000001 1.3546870014999999 ZT16-19 2.56784118175 2.2428773189999998 2.8928050445 ZT20-23 4.675184439000001 3.9608194875000002 5.3895493905