condition mean min max ZT0-3 21.783434 21.783434 21.783434 ZT4-7 14.601556 14.601556 14.601556 ZT8-11 14.268081500000001 14.268081500000001 14.268081500000001 ZT12-15 53.857915 53.857915 53.857915 ZT16-19 27.679674499999997 27.679674499999997 27.679674499999997 ZT20-23 53.0722275 53.0722275 53.0722275