condition mean min max ZT0-3 24.74417425 14.8476161 34.640732400000005 ZT4-7 64.7213737575 62.14523873 67.29750878499999 ZT8-11 90.4941384675 77.422118255 103.56615868 ZT12-15 98.882176475 86.568554175 111.19579877499999 ZT16-19 109.48265107750001 102.444271305 116.52103085 ZT20-23 79.96885493250001 75.84503892000001 84.09267094500001