Sentences with phrase «linear models procedure»

Not exact matches

Given that the (usually) linear relationship is not assured to hold, I am concerned about an inference procedure that relies on a linear relationship that is selected in part because it looks strong in models.

I have tried a simple anova linear model using the lm procedure in R taking the logs of the tree ring widths and using three factors: tree, age and year (a total of about 2874 parameters) and the program bailed out with the complaint» Reached total allocation of 957Mb: see help (memory.size)».

It looked like it worked until I tested it on a truncated data set against the lm (linear models) regression procedure and found a slight glitch.

procedures that... first infer a linear relation (regression line) between ECS and variables... from models and then use that linear relation to constrain ECS given observations... can be strongly influenced by «bad» models that are not consistent with the data but exert large leverage on the inferred slope of the regression line.

Hierarchical linear modeling39 was used to examine intervention group differences in cortisol levels at waking and bedtime as well as in slope cortisol levels across the day, following analytic procedures used previously.5 Hierarchical linear modeling accounts for the nonindependence of repeated measures by modeling multiple data points as nested within individuals, which further allows for missing data.

This procedure extends the general linear model to allow for analysis of repeated measurements.