Hello   In proc logistic output how the 'DF' column has 1 degrees of freedom for each independent variable.   Is there any formula?. Please help. ... View more

Hello   Since the variables like Safety, Usability, Puchase Experience,Contact experience and Look are discrete variables, I wonder how can we convert them into two factors using factor analysis as it is defined for continuous variables.     ... View more

Hello   While doing factor analysis using proc factor   1) Can we have discrete and dummy variables together with continuous variables.   2) As per my understanding we can find correlation only if two variables are continuous, since using the option "corr" in proc factor returns correlation or partial correlations, which means if we have discrete or dummy variables proc factor returns partial correlation?.   Is partial correlation is used when we have discrete variables?.   please correct me if I am going wrong. ... View more

Hello   In logistic regression after deciling using proc rank, I ran proc freq which returned below output   I am getting different frequencies in each decile, is it necessary that we should get equal number of frequencies in each decile?.   Thanks ... View more

Hello   1) I am getting warning about correlated variables as shown in the screenshot, is there any specific reason for this?.   2) How to profile and interpret clusters when an interaction variable is used. Thanks ... View more

Hello   1) In Multiple Linear Regression what is the relation between beta coefficients and errors. Can we say if errors are normal distributed then beta coeffients are also normally distributed?.   2) Why do we need to look for convergence of logistic regression model, when can we say the model doesn't converge. Please refers me a book or simple example.   3) Request you to suggest me books on Dimension Reduction Techniques which includes topics like Factor Analysis, Principal Component analysis and Descriminent analysis.   Thanks ... View more

Hello   1) In logistic regression, if confidence interval includes the value 0 then what will be the conclusion on significance of the variable.   2) How to decide whether the data is Linear or Linearly Separable?.   Thanks ... View more

Hello   The format for the variable "race_date" is MMDDYY10. and there are 10 characters in the variable - 2 for date, 2 for month, 4 for year and two forward slashes.   Can you please let me know why the variable is displaying a Length of 8 in Column Properties. ... View more

Hello   I am getting optimal feasible solution as 31250 with decision variable values 0, 7.5 and 20.   proc optmodel; var x{1..3}>=0; max z=900*x[1]+1500*x[2]+1000*x[3]; con c1: 50000*x[1]+12000*x[2]+8000*x[3]<=250000; con c2: 1*x[1]+0*x[2]+0*x[3]<=4; con c3: 0*x[1]+1*x[2]+0*x[3]<=15; con c4: 0*x[1]+0*x[2]+1*x[3]<=20; solve with milp/presolver=none; print x[1] x[2] x[3]; quit;   x1,x3>=0 or integer x2>=0. But in excel it is given as 42,250 optimal feasible solution with decision variable values 4, 4.16,0. Please help if I am going wrong. ... View more