condition mean min max ZT0-3 0.029799183333333337 0.02125615 0.04529915 ZT4-7 0.0 0.0 0.0 ZT8-11 0.02191305 0.02191305 0.02191305 ZT12-15 0.045798375 0.02184475 0.06975200000000001 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0238659 0.0238659 0.0238659