Feb 5, 2017
Hi Martin Yang here:
Recently I did a four ingredients Mixture design, I have some problem with the JMP results.
JMP provides normal plot which indicates which factor is significant. Below is the half normal plot generated by JMP.
As we can see, Alipre ( one type of cement), OPC ( ordinary portland cement), Alipre*OPC (interaction between the two cements), citric acid ( retarder) are significant factors.
However, if you read the Effects report listed below: Only Alipre cement and Alipre*OPC qualify as significant factors, since their P-Value is smaller than 0.05.
My questions is why there is discrapancy betwwen normal plot and Effects Report? which one tells me which factor is significant?