condition mean min max ZT0-3 2.7011830862500004 1.7321843365 3.6701818360000003 ZT4-7 2.330808669 1.6653279265 2.9962894115 ZT8-11 4.2509236225 3.5630398645 4.9388073805 ZT12-15 3.8304813055 3.4182903104999998 4.242672300500001 ZT16-19 3.0343981827500004 2.710990751 3.3578056145 ZT20-23 4.064451914499999 4.0407798925 4.0881239365