Displaying 2 results from an estimated 2 matches for "depd27".
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dec27
2002 Apr 26
0
[Fwd: Re: degrees of freedom for t-tests in lme]
...Value Std.Error DF t-value
p-value
(Intercept) -11.24380 0.1725474 3209 -65.16353 <.0001
x 3.05784 0.0382305 3209 79.98440 <.0001
sex 0.01958 0.0057823 3209 3.38548 0.0007
depD27 0.01382 0.0593448 22 0.23293 0.8180
depD35 -0.06537 0.0550606 22 -1.18723 0.2478
depD50 -0.28581 0.0557979 22 -5.12220 <.0001
However, my real questions is: How DF = 3209 and 22 are calculated? I
follow
the book by Pinheiro...
2002 Apr 24
0
degrees of freedom for t-tests in lme
...es (N) is 3237
number of groups (J) is 26
number of level-1 variables (Q1) is 3, i.e., x, log(den) and sex
number of level-2 variables (Q2) is 1, i.e., dep
x and den are continuous variable
sex is associated with individual samples and has 2 levels
dep is associated with group has 4 levels: depD15, depD27, and depD35,
and depD35.
I got the results:
Fixed effects: y ~ x + log(den) + sex + dep
Value Std.Error DF t-value p-value
(Intercept) -11.29271 0.1681915 3206 -67.14200 <.0001
x 3.05937 0.0367970 3206 83.14182 <.0001
log(de...