All Questions
Tagged with control-group sample-size
5 questions
3
votes
1
answer
315
views
Justifying a smaller control group in survey study
I am planning a set of studies that are interlinked. The first study collects information from 400 participants (exposure group), then some psychometrics are performed to assess the questions. In a ...
- 333
-1
votes
1
answer
104
views
Determining sample size for comparing rate of occurrence between two groups
Scenario: You are running a comparative clinical study. A test product is being used by one portion of the population (Group T) and a control product is being used by another (Group C).
The Question: ...
- 3
0
votes
0
answers
30
views
Repeated measures with rotation of subjects within groups
I was wondering if you could help with the interpretation of a potential experimental design. We are testing two versions of a 'group' exam, score (out of 100) being the outcome variable, aggregated ...
- 1
4
votes
1
answer
653
views
In a multiple arm experiment, why does the control have to be larger than the experiment arms?
I am running a study with two experimental groups, each with slight modifications to their variables, and I want to be able to compare both to the same control. I have heard the control group should ...
- 51
6
votes
1
answer
395
views
Siginificant size for a Control Group
I am designing a project which requires me to select a Control Group. One of the business requirements stipulates that I select as small a sample size as possible for the Control Group so there will ...
- 101