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ERIC Number: ED100958
Record Type: Non-Journal
Publication Date: 1974-Apr
Pages: 73
Abstractor: N/A
Reference Count: N/A
Issues Concerning Inferences from Grouped Observations.
Burstein, Leigh
The investigation focused on the effects of using grouped data to estimate the relations that exist in data on individuals. Different research contexts were identified in which researchers group observations though interested in relations among measurements on individuals. The consequences of estimating regression coefficients from grouped data were examined from a "structural equations" perspective. A simple linear regression model was hypothesized and then modified by the incorporation of a "grouping variable." A taxonomy was generated from the modified model so that every possible grouping variable fit into one of four categories defined by the relations of the grouping criterion to other variables in the system. Each category was then examined for bias and efficiency of estimation. General principles were determined for choosing a grouping method which minimizes loss of information. The complications that arose in the multiple regression case were also delineated. (Author/SM)
Publication Type: Reports - Research
Education Level: N/A
Audience: N/A
Language: N/A
Sponsor: N/A
Authoring Institution: N/A