condition mean min max ZT0-3 29.0873 23.006 33.86475 ZT4-7 24.76395 24.76395 24.76395 ZT8-11 27.6109 27.6109 27.6109 ZT12-15 39.611650000000004 37.447050000000004 41.776250000000005 ZT16-19 37.64105 37.64105 37.64105 ZT20-23 40.04089999999999 40.04089999999999 40.04089999999999