I am using SPSS to run a Binary Logistic regression. I have the option of choosing Hosmer-Lemeshow goodness of fit test but see that SPSS chooses the default group size of 10 for the test. I want to do a 2 degree of freedom test and so need to select a group size of 4 for the test. Is there a way in SPSS that one can manually set the group size?