A Test of Hypothesis on Familial Correlations
Abstract
Description
Full text can be accessed at
http://www.jstor.org/stable/2532568?seq=1#page_scan_tab_contents
When familial data are analysed, the model usually employed assumes independence of family observations and constancy of interclass and intraclass correlations. A statistic for testing the validity of the assumptions of family independence and constant interclass and intraclass correlations is developed. The test statistic is for constant family size; it has an asymptotic chi-square distribution. An example to illustrate the theory is given using Frets's data on head lengths. A recommendation is made on how to apply the test to the general case of varying family sizes. Another recommendation is made on models to be tried once the null hypothesis is rejected.
When familial data are analysed, the model usually employed assumes independence of family observations and constancy of interclass and intraclass correlations. A statistic for testing the validity of the assumptions of family independence and constant interclass and intraclass correlations is developed. The test statistic is for constant family size; it has an asymptotic chi-square distribution. An example to illustrate the theory is given using Frets's data on head lengths. A recommendation is made on how to apply the test to the general case of varying family sizes. Another recommendation is made on models to be tried once the null hypothesis is rejected.
Keywords
Equal family sizes, Familial data, Interclass correlation, Intraclass correlation, Test of hypothesis, Varying family sizes