condition mean min max ZT0-3 119.998576 119.998576 119.998576 ZT4-7 116.692305 116.692305 116.692305 ZT8-11 131.3566485 131.3566485 131.3566485 ZT12-15 107.1388015 107.1388015 107.1388015 ZT16-19 93.0437745 93.0437745 93.0437745 ZT20-23 100.65457549999999 100.65457549999999 100.65457549999999