condition mean min max ZT0-3 14.44125 14.44125 14.44125 ZT4-7 10.022314999999999 10.022314999999999 10.022314999999999 ZT8-11 9.340585 9.340585 9.340585 ZT12-15 13.996849999999998 13.996849999999998 13.996849999999998 ZT16-19 20.8883 20.8883 20.8883 ZT20-23 17.1303 17.1303 17.1303