condition mean min max ZT0-3 87.784476 87.784476 87.784476 ZT4-7 109.2569905 109.2569905 109.2569905 ZT8-11 121.90335350000001 121.90335350000001 121.90335350000001 ZT12-15 177.67848850000001 177.67848850000001 177.67848850000001 ZT16-19 169.3577235 169.3577235 169.3577235 ZT20-23 204.7421605 204.7421605 204.7421605