condition mean min max ZT0-3 165.164664 165.164664 165.164664 ZT4-7 211.3770825 211.3770825 211.3770825 ZT8-11 221.2338165 221.2338165 221.2338165 ZT12-15 237.61846000000003 237.61846000000003 237.61846000000003 ZT16-19 169.74557149999998 169.74557149999998 169.74557149999998 ZT20-23 174.73366 174.73366 174.73366