condition mean min max ZT0-3 686.010701 686.010701 686.010701 ZT4-7 657.9345275000001 657.9345275000001 657.9345275000001 ZT8-11 507.8976665 507.8976665 507.8976665 ZT12-15 483.839953 483.839953 483.839953 ZT16-19 531.76788 531.76788 531.76788 ZT20-23 537.2072775 537.2072775 537.2072775