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This function estimates the confidence interval for the grand mean of a balanced linear (mixed) model.
CIgrandMean(object, alpha = 0.05)
# S3 method for CIgm
print(x, ...)CIgrandMean returns a vector of interval endpoints and center.
print.CIgm has no return.
An lm object possibly containing random effects.
A scalar significance level for the confidence interval.
An object returned from CIgrandMean.
Additional arguments (not used).
Kristian Hovde Liland
This implementation is only valid for models containing no continuous effects and only balanced data.
Suggestions are welcome.
set.seed(42)
dataset <- data.frame(y=rnorm(8), x=factor(c(rep(1,4),rep(0,4))), z=factor(rep(c(1,0),4)))
mixlm <- lm(y~x*r(z), data = dataset)
CIgrandMean(mixlm)
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