All Questions
Tagged with simulation statistical-power
72
questions
2
votes
1
answer
59
views
Power calculation with a binary outcome (using a R package & manual simulation)
I am trying to compare three different methods for power calculation under the same setting. Although I understand that the power estimates from each method cannot be exactly identical due to ...
- 335
1
vote
2
answers
65
views
Mixed model: Which parameters to provide for sample size calculations?
I am currently planning an analysis in a relatively new area of research and would like to provide data that will allow for future power analyses. Unfortunately, I am completely lost in the ...
- 415
0
votes
0
answers
35
views
Calculating Sample Size for Cumulative Link Mixed Model (CLMM)
I am going to collect data in which each participant answers to 3 questions to 18 vignettes (each vignette has 3 questions), each question with likert scales 1-5. The dependent variables (questions) ...
0
votes
0
answers
76
views
Post hoc power for multiple logistic regression
I have data frame named "finalend", I conducted multiple logistic regression model named "model" with all predictors as categorical or binomial variables and "TestAnxiety"...
- 33
2
votes
0
answers
57
views
Power sizing when sampling from a group with known subgroups
I need to do a power analysis of a group that is composed of three subgroups.
The measurements to sample are difference measurements between two dogs of the same breed rated side by side. Dogs are ...
3
votes
1
answer
574
views
Calculating minimum sample size required for repeated measures linear mixed model using the simr package
I would like to use the simr package to calculate the smallest sample size needed to achieve $0.80$ power at the $0.05$ alpha level while accounting for a small ...
- 31
1
vote
1
answer
110
views
1
vote
2
answers
56
views
Estimating error variance for simulated path analysis
I want to run a simulation using lavaan and simsem to determine the sample size to use in a study using path analysis. The ...
- 13
3
votes
1
answer
82
views
Why do we have to simulate the response variable in simulation-based power analysis?
I have some existing data, and I want to do a power analysis for a second confirmatory study. I want to estimate the number of participants I would need for having a power of .9, keeping the same ...
- 137
1
vote
0
answers
36
views
Estimate minimum detectable effect using simulations [closed]
In a study investigating a time-to-event outcome in a propensity score matched sample, the authors state the following in their methods: "Where no evidence of difference between the compared ...
- 11
0
votes
0
answers
21
views
Simulate competing risks
I am trying to simulate competing risks data for a power analysis. Based on historical data, we know that after 12 months:
40% had experienced the event of interest
20% had experienced the competing ...
- 1,900
0
votes
0
answers
50
views
Power analysis for correlated data points
I want to using simulation to determine the effect size that could be detected with my sample size. What makes the simulation a bit complicated is that my dataset is about species traits. It means ...
- 1
2
votes
1
answer
386
views
Power analysis for simple LMER model in R from scratch
I'd like to compute power for some rather simple lmer models. I am aware of some packages like simr but the tutorials are not easy to follow because they ...
8
votes
1
answer
526
views
Power analysis for GAMM
Question
I am struggling with understanding how to run a simulated power analysis for GAMMs. Though my planned studies will include more variables, the core issue I'm trying to work out is to simulate ...
- 15.9k
0
votes
0
answers
68
views
How to simulate monotonic data with constrained range?
I'm running simulations for a power analysis for a negative binomial GLMM. The dependent variable has a negative binomial distribution and will be measured at five time points. It has two other ...
- 190