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Path analysis is a device for evaluating the interrelationships among the variables by analyzing their correlational structure. The relationships between the variables are many times illustrated graphically by means of the path diagram, in which single headed arrows specify the direct influence of one variable on the other, and curved double headed arrows specify correlated variables. An instance of such a diagram for a correlated two factor model is shown in the Figure drawn below. Originally introduced for the simple regression models for the observed variables, the technique has now become the basis for more sophisticated procedures like confirmatory factor analysis and structural equation modelling, including both manifest variables.
A term commonly encountered in the analysis of the contingency tables. Such type of frequencies are the estimates of the values to be expected under hypothesis of interest. In a tw
Quantile regression is an extension of the classical least squares from estimation of the conditional mean models to the estimation of the variety of models for many conditional q
Change point problems : Problems with chronologically ordered data collected over the period during which there is known to have been a change in the underlying data generation cou
Likert scales is often used in the studies of attitudes in which the raw scores are based on the graded alternative responses to each of a series of queries. For instance, the sub
The Null Hypothesis - H0: γ 1 = γ 2 = ... = 0 i.e. there is no heteroscedasticity in the model The Alternative Hypothesis - H1: at least one of the γ i 's are not equal
The technique of sampling used in the ecology for determining how much plants or animals are in a given fixed region. A set of randomly placed lines or points is recognized and the
Bartlett decomposition : The expression for the random matrix A which has a Wishart distribution as the product of the triangular matrix and the transpose of it. Letting each of x
How do I report the results in the table?
Method of moments is the procedure for estimating the parameters in a model by equating sample moments to the population values. A famous early instance of the use of the proced
Maternal mortality : The maternal death is the death of a woman while pregnant, delivering a baby or within 42 days of the termination of pregnancy, from any reason related to or a
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