condition mean min max ZT0-3 19.06771610175 4.8867480635 33.24868414 ZT4-7 0.63798429675 0.3031816425 0.972786951 ZT8-11 1.7291612725 1.1676807230000001 2.290641822 ZT12-15 5.505937219000001 3.0651939435 7.946680494500001 ZT16-19 11.40419857825 9.8056038465 13.002793310000001 ZT20-23 12.6695791125 11.75396 13.585198225