The MODEL statement names a single
dependent variable
and the
fixed effects
, which determine the
X
matrix of the
mixed model
.
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dependent
is a single dependent variable,
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<
fixed-effects
>
consists of a variable or combination of variables that have a fixed number of levels. Refer to
Specification of Effects
for instructions on specifying effects.
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</options>
specify
model
building parameters, tolerances, and statistical computations and output.
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ALPHA=
number
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This option requests that a
t
-type confidence interval be constructed for each of the fixed-effects parameters with confidence level
1-number
. The value of
number
must be between 0 and 1; the default is 0.05.
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This option requests
chi-square
tests be performed for all specified effects in addition to the
F
tests. Type 3 tests are the default; you can produce the Type 1 and Type 2 tests by using the
HTYPE=
option.
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This option requests that
t
-type confidence limits be constructed for each of the fixed-effects parameter estimates. The confidence level is 0.95 by default; this can be changed with the
ALPHA=
option.
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This option tunes the
sensitivity
in forming Type 3 functions. Any element in the estimable function basis with an absolute value less than number is set to 0. The default is
1E-8
.
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Type specific PROC MIXED MODEL options in the
PROC MIXED MODEL Statement Options
field.
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For example, to produce the approximate correlation matrix of the fixed-effects parameter estimates for the dependent variable
Disease
as affected by gender, type
Disease=Sex/CORRB
, as shown below:
Refer to the
SAS PROC MIXED MODEL Statement documentation
for more information.