condition mean min max ZT0-3 72.05803333333333 54.268649999999994 85.3579 ZT4-7 47.838300000000004 47.838300000000004 47.838300000000004 ZT8-11 45.90035 45.90035 45.90035 ZT12-15 67.7604 63.5783 71.9425 ZT16-19 70.77645 70.77645 70.77645 ZT20-23 85.88045 85.88045 85.88045