BRM_CHAPTER 18+20 QUIZ

______ is an agglomerative method of hierarchical clustering in which clusters are generated to minimize the within-cluster variance.

• variance method

• direct method

• linkage method

• centroid method

In discriminant analysis, the criterion or dependent variable is and the predictor or independent variables are in nature.

• interval; categorical

• 1. ordinal; interval

• categorical; interval

• 1. ordinal; categorical 

1. Which of the following statements is NOT an objective of discriminant analysis?

• 1. examination of whether significant differences exist among the groups, in terms of the criterion variables

• 1. determination of which predictor variables contribute to most of the intergroup differences

• 1. classification of cases to one of the groups based on the values of the predictor variables

• evaluation of the accuracy of classification

1. If there are 10 groups and 8 predictors, how many discriminant functions can be estimated?

• 7

• 8

• 9

• 10

1. As one of the statistics associated with discriminant analysis, _______ are obtained when the unstandardized coefficients are multiplied by the values of the variables and the products are summed and added to the constant term.

• 1. Wilks' λ

• discriminant scores

• 1. discriminant function coefficients

• 1. eigenvalue 

In discriminant analysis, we can obtain some idea of the relative importance of the variables by ________.

• 1. examining the absolute magnitude of the standardized discriminant function coefficients

• 1. examining the structure correlations, or canonical loadings or discriminant loadings

• 1. examining the unstandardized discriminant function coefficients

• 1. A and B are correct 

  
  

1. Which method allows the researcher to obtain information on cluster membership of cases if the number of clusters is specified?

• scattergram

• cluster centroid

• dendrogram

• icicle pilot

In nonhierarchical clustering, the ratio of total within-group variance to between-group variance can be plotted against the number of clusters.

• True

• False

______ is a nonhierarchical clustering method in which a cluster center is selected and all objects within a prespecified threshold value from the center are grouped together.

• Centroid methods

• Parallel threshold method

• Sequential threshold method

• Optimizing partitioning method

______ is a linkage method that is based on minimum distance or the nearest neighbor rule.

• Complete linkage

• Single linkage

• Average linkage