Hello. How we understand the blocks in the central composite design that was used for optimization of effective factors on experiment is significant or not significant statistically if the p- value of them did not exist?
Fatemeh Nejabati Fatemeh, Are you working with linear or nonlinear regression ? — — In a non-linear regression this condition indicates that the independent variable has no relationship with the dependent variable because it literally adds nothing to the dependent variable in the equation. However, in linear regression, a P value indicates whether the relationship between an independent variable and the dependent variable is statistically significant.