condition mean min max ZT0-3 0.005781683 0.0 0.011563366 ZT4-7 0.107482299 0.0417435425 0.1732210555 ZT8-11 0.42649860624999997 0.344629905 0.5083673074999999 ZT12-15 0.658840125 0.6453651235 0.6723151265 ZT16-19 0.28518565225000003 0.2550987025 0.315272602 ZT20-23 0.37991881875 0.35221394549999996 0.407623692