PNB 3RM3 Lecture Notes - Lecture 2: Statistical Inference, Likert Scale, Factor Analysis

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Conceptual level researcher"s defintion of a variable at an abstract level. Operational level researcher"s specific decision on how to measure or manipulate a variable. Weak, involves placing variables into groups by names. Nominal scales: uses names to label levels of variables. Cases in each level all have to be equivalent. A measure of qualitative differences, that places items into mutually exclusive characteristics categories, and should never be used if a quantitative measure can be used. Any numbers used are arbitrary/meaningless instead issues: items that exhibit overlap between categories cannot be fitted into a mutually exclusive category. A categorical s cale that repres ents o nl y qualitative differences . It us es names to label its levels (which are categories ) of variables. Examples: sex, religion, species, often used for demographic information. Broad, you can report percentages, do inferential statistics. Ordinal: provides information about the relative position of items on your scale.

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