condition mean min max ZT0-3 62.4496 61.73325 63.165949999999995 ZT4-7 51.3045 51.3045 51.3045 ZT8-11 57.676100000000005 57.676100000000005 57.676100000000005 ZT12-15 0 0 0 ZT16-19 79.68445 79.68445 79.68445 ZT20-23 59.5196 59.5196 59.5196