condition mean min max ZT0-3 115.978769 115.978769 115.978769 ZT4-7 226.7506795 226.7506795 226.7506795 ZT8-11 161.49005949999997 161.49005949999997 161.49005949999997 ZT12-15 117.37104649999999 117.37104649999999 117.37104649999999 ZT16-19 115.002959 115.002959 115.002959 ZT20-23 123.6322225 123.6322225 123.6322225