condition mean min max ZT0-3 77.1509 69.4457 83.65755 ZT4-7 57.05435 57.05435 57.05435 ZT8-11 59.484700000000004 59.484700000000004 59.484700000000004 ZT12-15 143.79874999999998 131.3885 156.209 ZT16-19 111.02199999999999 111.02199999999999 111.02199999999999 ZT20-23 105.48554999999999 105.48554999999999 105.48554999999999