Table-6: Model Fit Statistics of confirmatory

factor analysis for Urdu Version of PANAS (N=495).

However, this could be partly solved by iterations of

factor analysis that include the latest input data.

Rotation is a very esoteric topic in

factor analysis and has a lot of subjective interpretations, but the authors have done a good job in demystifying this topic and providing a decision tree for rotating the factors which would be quite useful for the researchers.

Thus, LDA is a particular case of

factor analysis framework when the entire weight matrix is 1 and the basis of partition is class information.

Exploratory

factor analysis (EFA) is concerned with the question of how many factors are necessary to explain the relations among a set of indicators and with the estimation of the factor loadings, whereas confirmatory

factor analysis (CFA) is concerned with parameter estimation and tests of hypotheses regarding, for example, the number of factors underlying the relations among a set of indicators (Pedhazur, Schmelkin 1991).

On the other hands,

factor analysis is suitable multivariate technique in identify and determination of independent factors that are effective on plant traits separately.

Factor analysis in the development and refinement of clinical assessment instruments.

In our study we have used

factor analysis for a specific purpose to identify the variables falling under two different factors representing the controls.

Use of

Factor Analysis Scores in MLRA: The appropriateness of

factor analysis was tested with Kaiser- Meyer-Olkin (KMO) measure of sampling adequacy and Bartlett's test of sphericity (Sharma, 1996).

Factor coefficients (Cik) were used to obtain factor scores for the selected factors in the

factor analysis.

A second order

factor analysis yielded three dimensions.

Discriminant function analysis was carried out using the food and nutrient factor scores derived through the

factor analysis to determine as to how correctly those people who were chronic energy-deficient or overweight/obese are classified.