condition mean min max ZT0-3 0.023088325 0.022798 0.02337865 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0230105 0.0230105 0.0230105 ZT20-23 0.02298405 0.02298405 0.02298405