condition mean min max ZT0-3 29.889331 29.889331 29.889331 ZT4-7 41.802216 41.802216 41.802216 ZT8-11 45.9658805 45.9658805 45.9658805 ZT12-15 39.713744 39.713744 39.713744 ZT16-19 36.885522 36.885522 36.885522 ZT20-23 37.384001999999995 37.384001999999995 37.384001999999995