condition mean min max ZT0-3 9.553114 9.553114 9.553114 ZT4-7 10.900098 10.900098 10.900098 ZT8-11 9.4129215 9.4129215 9.4129215 ZT12-15 9.1917145 9.1917145 9.1917145 ZT16-19 9.5369655 9.5369655 9.5369655 ZT20-23 10.0681745 10.0681745 10.0681745