This menu can be used to fit generalized linear models to data from one- or two-stage surveys. Variance estimates reflecting
the survey design are estimated by a bootstrap method or, in the case of Normal data, a Taylor series approximation.
Survey weights are used to ensure that unbiased estimates of the finite survey population parameters are produced. It should
be noted that using a weighted analysis is not the only way to handle such data; in some circumstances it may be preferable
to use an unweighted analysis, including factors reflecting the survey design. Mixed models, such as those fitted by the
Linear Mixed Model menu, the Generalized Linear Mixed Models menu or the Hierarchical Generalized Linear Models menu may
be another way of accounting for the correlations induced in the data by the survey design.
Design
Specifies the type of survey to tabulate. You can choose from
a simple random survey, a stratified random survey,
one stage cluster survey or two-way survey.
Stratification factor
For a stratified survey, this is the factor indicating the stratum to which each unit belongs.
Sampling Units
A factor indicating the primary sampling units for a two stage survey or one stage
cluster survey.
Weights
A variate containing survey weights.
Response Variate
Specifies the response variate (dependent variate).
Model to be fitted
The terms to be fitted to the model are specified by entering a model formula.
Distribution
List of available error distributions for the generalized linear model. If you select the
binomial distribution, then you must supply the binomial totals in the space provided.
Link Function
Lists the available link functions for the model.
Available Data
This lists data structures appropriate to the current input field. It lists
either factors for use in specifying the genotypes, environments and
replication, or variates for specifying the data. The contents will change as
you move from one field to the next. Double-click on a name to copy it to the
current input field; alternatively, you can type the name directly into the
input field.
Operators
This provides a quick way of entering operators in the fixed and random model formulas.
Double-click on the required symbol to copy it to the current input field. You can also
type in operators directly. See model formula for a description of each.