https://communities.sas.com/t5/Statistical-Procedures/Mixed-level-Designs/m-p/573408#M28199 <P>Hi,</P><P>&nbsp;</P><P>Is there any situation in which a mixed-level design is associated with a quadratic model?</P><P>It seems to me that the mixed-level L18 designs are only capable of generate main effects models, is this right? But I can't understand if for example a mixed-level full factorial or a mixed-level fractional factorial (non L18) can generate a quadratic model.&nbsp;</P><P>&nbsp;</P><P>Thanks in advance!</P> Sun, 14 Jul 2019 23:58:45 GMT HelenaB 2019-07-14T23:58:45Z https://communities.sas.com/t5/Statistical-Procedures/Mixed-level-Designs/m-p/573408#M28199 <P>Hi,</P><P>&nbsp;</P><P>Is there any situation in which a mixed-level design is associated with a quadratic model?</P><P>It seems to me that the mixed-level L18 designs are only capable of generate main effects models, is this right? But I can't understand if for example a mixed-level full factorial or a mixed-level fractional factorial (non L18) can generate a quadratic model.&nbsp;</P><P>&nbsp;</P><P>Thanks in advance!</P> Sun, 14 Jul 2019 23:58:45 GMT https://communities.sas.com/t5/Statistical-Procedures/Mixed-level-Designs/m-p/573408#M28199 HelenaB 2019-07-14T23:58:45Z