Does the variance of the Random-Effect influence the p-values?
We study the classical setup of a randomized complete block design with 2 treatments, 2 replications per block and 5 blocks. We vary the variance of the bloc...
Posts by Tag
simulation
T-test vs Wilcoxon vs Median Test
Define a list of laws (i.e., distributions) with mean and sd.
Exponential Glm Coverage
Simulate a glm with exponential distribution such that
Testing Slopes in a LMM – Should we Simplify?
TLDR: Given a dataset as shown in the last plot, we consider the following analyses: For each subject extract the slope and perform a simple t-test on the...
Contrasts against Control: Dunnet vs. Holm vs. TukeyHSD
TLDR: Even though Dunnet is proven to be optimal (in all vs comparison) for a reasonable group number (around 10) Holm seems to yield basically the same resu...
Pairwise T-tests can be improved by including more groups
TLDR: more groups make the test more stable and slightly more powerful (for low sample sizes). However, be aware that this assumes homoscedasticity (i.e., eq...
power
Does the variance of the Random-Effect influence the p-values?
We study the classical setup of a randomized complete block design with 2 treatments, 2 replications per block and 5 blocks. We vary the variance of the bloc...
T-test vs Wilcoxon vs Median Test
Define a list of laws (i.e., distributions) with mean and sd.
Exponential Glm Coverage
Simulate a glm with exponential distribution such that
Testing Slopes in a LMM – Should we Simplify?
TLDR: Given a dataset as shown in the last plot, we consider the following analyses: For each subject extract the slope and perform a simple t-test on the...
Contrasts against Control: Dunnet vs. Holm vs. TukeyHSD
TLDR: Even though Dunnet is proven to be optimal (in all vs comparison) for a reasonable group number (around 10) Holm seems to yield basically the same resu...
Pairwise T-tests can be improved by including more groups
TLDR: more groups make the test more stable and slightly more powerful (for low sample sizes). However, be aware that this assumes homoscedasticity (i.e., eq...
lmm
Testing Slopes in a LMM – Should we Simplify?
TLDR: Given a dataset as shown in the last plot, we consider the following analyses: For each subject extract the slope and perform a simple t-test on the...
validity_check
T-test vs Wilcoxon vs Median Test
Define a list of laws (i.e., distributions) with mean and sd.