ENG ELC 220 Lecture Notes - Lecture 18: Statistical Hypothesis Testing, Construct Validity, Linear Combination
1 Nov 2020
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: one factor of all household devices (group) is electricity; one factor for temperature, pole star position and number of winter days is geographical latitude. It is used to study patterns of relationships between many variables. Factor loading: the relative connection (correlation) between an original variable and a factor (meaningful: at least +/-0. 3) Explanatory factor analysis (efa): aims to reduce data sets comprising large number of variables into a smaller number of factors and thus identify underlying factor structure/model explanatory in nature. Confirmatory factor analysis (cfa): aims to confirm theoretical predictions; testing whether a specified set of constructs influences responses in a predicted way (hypothesis testing). A theoretical model is set up based on efa and then tested using a new set of data. Pca: there is an infinite number of equally accurate factor solutions for any given data set,
