condition mean min max ZT0-3 25.64195 22.4925 28.7914 ZT4-7 8.970189999999999 8.970189999999999 8.970189999999999 ZT8-11 5.972759999999999 5.972759999999999 5.972759999999999 ZT12-15 0 0 0 ZT16-19 10.494869999999999 10.494869999999999 10.494869999999999 ZT20-23 15.21245 15.21245 15.21245