Exam 20: Cluster Analysis

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Why should the clustering of variables be used?

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Which cluster analysis procedure can automatically determine the optimal number of clusters by comparing the values of a model-choice across different clustering solutions?

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The ________ is a nonhierarchical method in which a cluster center is selected and all objects within a pre-specified threshold value from the center are grouped together.

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Principal components are usually easier to interpret than the cluster components.

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________ is frequently referred to as k-means clustering.

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In cluster analysis,the set of variables selected should describe the similarity between objects in terms that are relevant to the marketing research problem.

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________ is a variance method in which the squared euclidean distance to the cluster means is minimized.

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What are the steps in conducting cluster analysis (Figure 20.3 in the text)?

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In non-hierarchical clustering,plotting the ratio of total within-group variance to between-group variance against the number of clusters is useful if you are ________.

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Which is best to use when selecting a clustering procedure: hierarchical or nonhierarchical clustering?

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

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Clustering should be done on samples of ________ or more.

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A(n)________ or tree graph is a graphical device for displaying clustering results.Vertical lines represent clusters that are joined together.The position of the line on the scale indicates the distances at which clusters were joined.

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