Exam 19: Factor Analysis

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________ is an approach to factor analysis that considers the total variance in the data.

(Multiple Choice)
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The variables to be included in the factor analysis should be specified based on past research,theory,and the judgment of the researcher.

(True/False)
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If interpreting factors using the rotated factor matrix,a negative coefficient for a negative variable (prevention of tooth decay is not important)would lead to a positive interpretation (prevention of tooth decay is important).

(True/False)
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Sometimes,because of prior knowledge,the researcher knows how many factors to expect and thus can specify the number of factors to be extracted beforehand.This is referred to as ________.

(Multiple Choice)
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The test statistic for sphericity is based on a chi-square transformation of the determinant of the correlation matrix.A large value of the test statistic will favor the acceptance of the null hypothesis.

(True/False)
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Describe principal components analysis and common factor analysis and the differences between the two methods of factor analysis.

(Essay)
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m represents ________ in the factor model,Xi = Ai1 F1 + Ai2 F2 + Ai3 F3 + ...+ Aim Fm + ViUi,.

(Multiple Choice)
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A ________ is a plot of the original variables using the factor loadings as coordinates.

(Multiple Choice)
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Which statement is not true about principal components analysis (PCA)?

(Multiple Choice)
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The factors identified in factor analysis are overtly observed in the population.

(True/False)
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When selecting surrogate variables from variables with similarly high loadings,the choice should be based on ________.

(Multiple Choice)
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The equation Xi = Ai1 F1 + Ai2 F2 + Ai3 F3 + ...+ Aim Fm + ViUi ,represents the common factors expressed as linear combinations of the observed variables.

(True/False)
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Factor analysis is somewhat similar to discriminant analysis in that each variable is expressed as a linear combination of underlying factors.

(True/False)
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________ is a class of procedures primarily used for data reduction and summarization.

(Multiple Choice)
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Rotation does not affect the communalities and the percentage of total variance explained.

(True/False)
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The ________ represents the total variance explained by each factor.

(Multiple Choice)
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It is possible to compute as many principal components as there are variables;in doing so,parsimony is gained.

(True/False)
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Factor loadings represent the correlations between sets of variables.

(True/False)
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A factor model that provides a good fit to the data has many large residuals.

(True/False)
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Under what general circumstances is factor analysis used?

(Essay)
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