condition mean min max ZT0-3 0.462194 0.462194 0.462194 ZT4-7 0.29019255 0.29019255 0.29019255 ZT8-11 0.3894585 0.3894585 0.3894585 ZT12-15 0.5399579999999999 0.5399579999999999 0.5399579999999999 ZT16-19 0.7607205 0.7607205 0.7607205 ZT20-23 0.3874915 0.3874915 0.3874915