The process of taking the difference between two values to achieve desirable statistical properties. e.g. paired differences t-test, differences between time points in an AR(1) model, and difference-in-differences causal impact analysis.
Questions tagged [differences]
164 questions
3
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1 answer
Percentage change of interval data
My understanding is that the percentage/relative change is applicable/meaningful only with ratio data, and not with interval data. Can you confirm it is right, or correct me if it's wrong?
lee27
- 173
1
vote
1 answer
Getting relative measure of difference between two numbers - Reference (close to) zero
I'll be writing a program that compares two numbers and based on how different they are, perform, or not perfom an action. It would make sense to have one formula to get a standardized measure that I can use on all number sets.
I've tried each of…
1
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0 answers
Method to compare difference in average treatment effect between 2 subgroups and then between two study arms? Difference in differences for RCT data?
Essentially I have an RCT with 1 intervention arm and 1 control arm. Within each arm I have 2 sub-groups I want to compare the average treatment effect (drug users and non-drug users) for a binary outcome. I then want to compare the difference…
Jessica
- 11
1
vote
1 answer
Compare the progression in multiple groups with different starting points
I am working on a project where 8 municipalities have participated in a program, in which they received consultancy on how to restructure the social sector. As a part of the program the municipalities have been able to follow their development…
BeeBee
- 33
- 5
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Two-dimensional difference test
Suppose I need to find out whether both the average height and the average weight of a person in two populations are the same. Is there a standard extension of the difference test in two dimensions? If not, what are the common techniques for solving…
voligno
- 41
0
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how to treat values that evaluate to negative infinity with computing a percent reduction
A main limitation for reporting or measuring a percent reductions is having zero in the denominator. For example, if one was counting data on paired subjects and then analyzing the effects of some treatment before 'b' and after 'a' implementation.…
cn838
- 19
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1 answer
Would relative or absolute differences be more meaningful in this case? Why?
I 'm involved in a study where precentage values of carbon were take beneath between two adjacent fields. The adjacent fields differ by the vegetation cover (X, Y). Vegetation X is novel (planted 10 yrs ago) whereas vegetation Y has been there for…
Vera Maria
- 31
0
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1 answer
Inferential test for differences in frequencies between groups?
I would like to have your suggestions regarding the kind of statistical analysis that would fit the nature of my data.
Participants have seen 12 videos, in each of which an emotion was conveyed and they had to guess which emotion was conveyed in…
Pernelle
- 85
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