condition mean min max ZT0-3 44.694011 44.694011 44.694011 ZT4-7 30.6800145 30.6800145 30.6800145 ZT8-11 38.800477 38.800477 38.800477 ZT12-15 33.906239 33.906239 33.906239 ZT16-19 41.6278935 41.6278935 41.6278935 ZT20-23 34.6204525 34.6204525 34.6204525