condition mean min max ZT0-3 0.9388974999999999 0.9388974999999999 0.9388974999999999 ZT4-7 0.991042 0.991042 0.991042 ZT8-11 0.7975315000000001 0.7975315000000001 0.7975315000000001 ZT12-15 1.0112195000000002 1.0112195000000002 1.0112195000000002 ZT16-19 1.8622699999999999 1.8622699999999999 1.8622699999999999 ZT20-23 0.7903125 0.7903125 0.7903125