condition mean min max ZT0-3 0.5043528333333334 0.317021 0.6386225 ZT4-7 0.4093825 0.4093825 0.4093825 ZT8-11 0.507556 0.507556 0.507556 ZT12-15 1.72887 1.553375 1.9043649999999999 ZT16-19 1.291998 1.291998 1.291998 ZT20-23 1.201105 1.201105 1.201105