condition mean min max ZT0-3 13243.4 13243.4 13243.4 ZT4-7 15335.8 15335.8 15335.8 ZT8-11 17108.1 17108.1 17108.1 ZT12-15 15803.35 15803.35 15803.35 ZT16-19 13972.95 13972.95 13972.95 ZT20-23 12411.400000000001 12411.400000000001 12411.400000000001