Factor analysis is a class of procedures that allow the researcher to observe a group of variables that tend to be correlated to each other and identify the underlying dimensions that explain these correlations. In other words, factor analysis is a class of procedures that are primarily used for data reduction and data summarization.

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There are many statistical methods that are used to study the relationship between independent variables and dependent variables, but factor analysis is used to understand the patterns of relationships among many dependent variables while simultaneously discovering the nature of the independent variables that affect them.

In the business field, there are large numbers of variables that are correlated and are required to get reduced to a manageable level. This indicates the usage of factor analysis.

Factor analysis is an interdependence technique because factor analysis involves the examination of interdependence relationships.

Factor analysis involves factors that are the underlying dimensions that define the correlations among the set of variables.

In the field of psychology, researchers can utilize factor analysis to understand the psychographic profile of a person by studying his lifestyle statements.

Factor analysis is widely used in the business field. In market research, factor analysis can be used in market segmentation in order to identify the underlying variables upon which the consumers are being grouped. Factor analysis is then used to segment the customers into categories like economically sensitive, convenience sensitive, comfort sensitive, performance sensitive, etc.

There are two approaches of factor analysis. One of the approaches of factor analysis is common factor analysis. Common factor analysis, as the name suggests, involves the estimation of the factors based only on the common variance. On the other hand, in principal component factor analysis, the total variance of the data is considered.

There are certain statistics that are associated with factor analysis.

The Bartlett’s test of sphericity in factor analysis is a test statistic that is used to examine the null hypothesis that is assumed. This says that the variables are uncorrelated in the population.

The correlation matrix in factor analysis is used to show that there exists some correlation between all the pairs of variables that are being included in the analysis.

The Kaiser – Meyer- Olkin (KMO) measures of sampling adequacy in factor analysis is an index that is used to examine the appropriateness of factor analysis. Therefore, the researcher should keep in mind that if the value of this index is between 0.5 and 1, then factor analysis is appropriate. And if the values are below 0.5, then factor analysis is an inappropriate technique for that study.

Factor loadings in factor analysis are nothing but the simple correlation between the variables and the factors under study.

A factor matrix in factor analysis consists of the factor loadings of all the variables on all the factors being extracted.

The factor scores in factor analysis are the combined scores estimated for each respondent on the derived factors.As in all analysis, the first task of factor analysis is to formulate the problem. The next task is to construct the correlation matrix in factor analysis. Then, the researcher determines the method or an approach of the factor analysis. After determining the approach of factor analysis, the researcher determines the number of factors. The next task is to rotate the factors and interpret the factors by either calculating the factor scores or selecting the surrogate variables in factor analysis. After this, the researcher determines the model being fit in factor analysis.

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