What is discriminant analysis PDF?
What is discriminant analysis PDF?
Discriminant or discriminant function analysis is a. parametric technique to determine which weightings of. quantitative variables or predictors best discriminate. between 2 or more than 2 groups of cases and do so.
What are the assumptions of discriminant analysis?
Assumptions. The assumptions of discriminant analysis are the same as those for MANOVA. The analysis is quite sensitive to outliers and the size of the smallest group must be larger than the number of predictor variables. Multivariate normality: Independent variables are normal for each level of the grouping variable.
What are the advantages of discriminant analysis?
Discriminant analysis offers a potential advantage: it classified ungrouped cases. SPSS says: “The functions are generated from a sample of cases for which group membership is known; the functions can then be applied to new cases with measurements for the predictor variables but unknown group membership.”
What is the purpose of a factor analysis?
Factor analysis is used to uncover the latent structure of a set of variables. It reduces attribute space from a large no. of variables to a smaller no. of factors and as such is a non dependent procedure.
What is the basis purpose of factor analysis explain in detail the conditions that are required to be satisfied before carrying out a factor analysis exercise?
Factor analysis is a technique that is used to reduce a large number of variables into fewer numbers of factors. This technique extracts maximum common variance from all variables and puts them into a common score. As an index of all variables, we can use this score for further analysis.
What is role of Wilks lambda in a discriminant analysis?
Wilks’ lambda is a measure of how well each function separates cases into groups. It is equal to the proportion of the total variance in the discriminant scores not explained by differences among the groups. Smaller values of Wilks’ lambda indicate greater discriminatory ability of the function.
