Exam 18: Discriminant and Logit Analysis

In discriminant analysis,there is no multicollinearity in the predictor variables.Therefore,there is no ambiguous measure of the relative importance of the predictors in discriminating between groups.

When the probability of success,P,is modeled using OLS regression,P is constrained to lie between 0 and 1.

Discriminant functions are linear combinations of the predictor or independent variables,which will best discriminate between the categories of the criterion or dependent variable (groups).

The stepwise discriminant analysis method is appropriate when,based on previous research or a theoretical model,the researcher wants the discrimination to be based on all the predictors.

The hit ratio is the number of variables found to be significant by the discriminant analysis.

When the dependent variable is binary,the logit model can also be used instead of two-group discriminant analysis.

In two-group discriminant analysis it is possible to derive only one discriminant function.

A characteristic profile is an aid to interpreting discriminant analysis results by describing each group in terms of the group means for the predictor variables..

The null hypothesis in discriminant analysis,that in the population,the means of all discriminant functions in all groups are not equal,can be statistically tested.

As one of the statistics associated with discriminant analysis,the ________ for each predictor is the ratio of the within-group sum of squares to the total sum of squares.Its value varies between 0 and 1.

With the leave-one-out cross-validation option in SPSS,the discriminant model is re-estimated as many times as there are respondents in the sample.

If you are using the leave-out option of SPSS,you are at the ________ step of discriminant analysis.

When the probability of success,P is modeled using a binary logit model,it is constrained to lie between ________.

In discriminant analysis,the value of the coefficient for a particular predictor depends on the other predictors included in the discriminant function.

The logit model falls somewhere between regression and discriminant analysis in application.

Which of the following is not one of the steps involved in the "formulating the problem" step in discriminant analysis?

When the dependent variable is binary and there is one independent variable that is nonmetric,in addition to two-group discriminant analysis one can also use OLS regression,logit,and probit models for estimation.

Discriminant analysis can be conducted via all of the following except ________.

The results obtained from a classification matrix based on the analysis sample are invariably better than leave-one-out classification or the classification obtained on the holdout sample.

Cox and Snell R square and Nagelkerke R2 are measures of model fit used in ________.