All Questions
Tagged with control-group statistical-significance
14 questions
1
vote
3
answers
89
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Binomial test to establish a pass criterion
I'm sorry for the following -probably- stupid question.
I'm performing a psychological experiment and I have no idea about how to establish how many control items one has to pass to be included. My ...
- 175
0
votes
1
answer
144
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Appropriate statistical test to determine if uplift between control group and multiple test groups is significant (pretest/posttest evaluation)
I'm trying to evaluate whether the difference in uplift seen in below table between the test groups and the control group is statistically significant. I'm unsure about the appropriate statistical ...
- 1
2
votes
1
answer
842
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Control group much much larger than test group
I'm a complete noobie in statistics and this is just me being curious about a study I read online. In the study they had 150 people who had tested positive for disease X, and a control group of 4000 ...
- 21
0
votes
0
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15
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Binomial Proportion Test on test and control populations [duplicate]
I am new to statistical tests and request your help with the following question:
A company wants to test the hypothesis that it's new ad will increase it's total number of subscribers (conversion rate)...
2
votes
1
answer
274
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Minimum sample size and power test
Suppose I have access to data on the energy consumption of a city with a population of 30000 persons. Imagine I want to test a new technology of smart energy, i.e if the energy consumption decreases ...
- 217
0
votes
0
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79
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In what situations is a one sample T-Test superior to a two sample T-Test?
I'm trying to make a case for more use and respect of one-sample t-test in medical studies (which are generally looked down upon, wrongfully so imo). I see that in general medical studies prefer at ...
- 111
1
vote
0
answers
138
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How to compare 2 groups to show significant differences?
I am conducting an experimental study. I have 2 groups: The first group contains 3 healthy persons and the other one contains 3 patients (sick people). For each person of the study, we collect several ...
- 61
1
vote
1
answer
234
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What is the name of the "test" for testing the similarity of control group and experiment group?
In a simple statistical analysis involving a control group and an experiment group, the research must demonstrate that before the experiment, the control group and the experiment group are the same or ...
- 885
0
votes
0
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31
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How to incorporate the customers leaving (addition of new ones) in the measurement of treatment effectiveness?
Consider I have taken a random sample for forming control group in month of January with sample size 5k and treatment group size being 95k.
I am Sending offers to treatment group which are intend to ...
- 333
0
votes
0
answers
290
views
Two intact groups and independent sample t-test
The purpose of my research study is to measure the effect of project-oriented instruction approach on students' cultural awareness and their attitude towards the learning of foreign cultures. My two ...
0
votes
1
answer
214
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Before/After unpaired study with control villages analysed in R
For the implementation of a project, we have been following household access to services in two groups of villages, one an intervention group (I) and one a control group (C). Access as a Yes/No ...
0
votes
1
answer
70
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comparsion of treatment groups based on different controls
I have experimental results from two days where I wasnt able to keep the same conditions from day1 to day2, so I have two sets of data:
control day1 -- 2x treatment groups day1
control day2 -- 2x ...
- 143
0
votes
1
answer
33
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Test for significance before testing
I got a question regarding the binomial distribution and testing for significance in general.
I need to divide a dataset into a treatment group (with phone call) and a control group (no phone call). ...
4
votes
1
answer
797
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Determining minimum required sample size for control (for purposes of measuring lift)
SO in a sales setting where people can either buy or not buy (i.e. binary response), say I have a treatment that I know (or believe strongly) to be effective. I want to give it to as many people as ...
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