condition mean min max ZT0-3 19.667343393 8.272198116 31.06248867 ZT4-7 52.93639311250001 46.855097955000005 59.01768827000001 ZT8-11 72.334152065 64.23327057 80.43503356 ZT12-15 40.6342537475 22.405945974999998 58.86256152 ZT16-19 13.07387392 11.782154685 14.365593155 ZT20-23 6.3157715765 4.789406723500001 7.8421364295