Description Author(s) References See Also Examples

Exam5.3 Inference using empirical standard error with different Bias connection

Muhammad Yaseen (myaseen208@gmail.com)

Adeela Munawar (adeela.uaf@gmail.com)

Stroup, W. W. (2012).

*Generalized Linear Mixed Models: Modern Concepts, Methods and Applications*. CRC Press.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | ```
data(DataSet4.1)
DataSet4.1$trt <- factor(x = DataSet4.1$trt)
DataSet4.1$block <- factor( x = DataSet4.1$block)
##---REML estimates on page 172
library(lme4)
# library(lmerTest)
Exam5.3REML <-
lmer(
formula = y ~ trt + (1|block)
, data = DataSet4.1
, REML = TRUE
# , control = lmerControl()
, start = NULL
# , verbose = 0L
# , subset
# , weights
# , na.action
# , offset
, contrasts = NULL
, devFunOnly = FALSE
# , ...
)
##---Standard Error Type "Model Based" with no Bias Connection
AnovaExam5.3REML <- anova( object = Exam5.3REML )
AnovaExam5.3REML
##---Standard Error Type "Model Based" with "Kenward-Roger approximation" Bias Connection
# library(pbkrtest)
anova( object = Exam5.3REML, ddf = "Kenward-Roger")
##---ML estimates on page 172
Exam5.3ML <-
lmer(
formula = y ~ trt + ( 1|block )
, data = DataSet4.1
, REML = FALSE
# , control = lmerControl()
, start = NULL
# , verbose = 0L
# , subset
# , weights
# , na.action
# , offset
, contrasts = NULL
, devFunOnly = FALSE
# , ...
)
##---Standard Error Type "Model Based" with no Bias Connection
AnovaExam5.3ML <- anova( object = Exam5.3ML )
AnovaExam5.3ML
##---Standard Error Type "Model Based" with "Kenward-Roger approximation" Bias Connection
anova( object = Exam5.3ML, ddf = "Kenward-Roger")
``` |

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