condition mean min max ZT0-3 1.344875 0.448125 1.80056 ZT4-7 0.7482314999999999 0.7482314999999999 0.7482314999999999 ZT8-11 1.247155 1.247155 1.247155 ZT12-15 3.8171550000000005 3.405015 4.2292950000000005 ZT16-19 3.2764100000000003 3.2764100000000003 3.2764100000000003 ZT20-23 2.7326550000000003 2.7326550000000003 2.7326550000000003