condition mean min max ZT0-3 29.258185 29.258185 29.258185 ZT4-7 30.2477935 30.2477935 30.2477935 ZT8-11 46.3251125 46.3251125 46.3251125 ZT12-15 51.771743 51.771743 51.771743 ZT16-19 63.0855485 63.0855485 63.0855485 ZT20-23 63.280666 63.280666 63.280666