condition mean min max ZT0-3 0.0932423 0.0 0.1864846 ZT4-7 0.0190935 0.0190935 0.0190935 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0065686125 0.0 0.013137225 ZT16-19 0.10724049999999999 0.09959666666666667 0.11488433333333332 ZT20-23 0 0 0